144 + Interview Questions in MOTION-IN-ONE-DIMENSION IN GENERAL AWARENESS Page 1 InterviewSolution

1.	A bus is moving with a speed of `10 ms^-1` on a straight road. A scooterist wishes to overtake the bus in `10 s`. If the bus is at a distance of `1 km` from the scooterist with what speed should the scooterist chase the bus ?A. `20 ms^(-1)`B. `40 ms^(-1)`C. `25 ms^(-1)`D. `10 ms^(-1)`
Answer» Correct Answer - A

Discussion

2.	A particle starts its motion from rest under the action of a constant force. If the distance covered in first `10 s` is `s_1` and the covered in the first `20 s` is `s_2`, then.A. `s_(2) = 2 s_(1)`B. `s_(2) = 3 s_(1)`C. `s_(2) = 4 s_(1)`D. `s_(2) = s_(1)`
Answer» Correct Answer - C

Discussion

3.	A body is moving from rest under constant acceleration and let `S_1` be the displacement in the first `(p - 1)` sec and `S_2` be the displacement in the first `p` sec. The displacement in `(p^2 - p + 1)` sec. will beA. `S_(1) +S_(2)`B. `S_(1)S_(2)`C. `S_(1) -S_(2)`D. `S_(1)//S_(2)`
Answer» Correct Answer - A

Discussion

4.	Water drops fall at regular intervals from a tap 5 m above the ground. The third drop is leaving the tap, the instant the first drop touches the ground. How far above the ground is the second drop at that instant. `(g = 10 ms^-2)`A. `2.50m`B. `3.75 m`C. `4.00m`D. `1.25m`
Answer» Correct Answer - B

Discussion

5.	Velocity-time curve for a body projected vertically upwards is 0 times (s)A. ParabolaB. EllipseC. HyperbolaD. Straight line
Answer» Correct Answer - D

Discussion

6.	A person travels along a straight road for the first half length with a velocity `v_(1) ` and the second half length with velocity ` v_(2)`. What is the mean velocity of the person ?A. `v_(1)v_(2)`B. `(v_(2)^(2))/(v_(1)^(2))`C. `(v_(1)+v_(2))/(2)`D. `(2v_(1)v_(2))/(v_(1)+v_(2))`
Answer» Correct Answer - D

Discussion

7.	A train is moving due east and a car is moving due north with equal speeds. A passenger in the train finds that the car is moving towardsA. East-north directionB. West-north directionC. South-east directionD. None of these
Answer» Correct Answer - B

Discussion

8.	A body is moving with velocity `30 m//s` towards east. After `10 s` its velocity becomes `40 m//s` towards north. The average acceleration of the body is.A. `7m//s^(2)`B. `sqrt(7)m//s^(2)`C. `5m//s^(2)`D. `1m//s^(2)`
Answer» Correct Answer - C

Discussion

9.	A man goes 10 m towards North, then 20 m towards east then displacement isA. 22.5 mB. 25mC. 25.5mD. 30m
Answer» Correct Answer - A

Discussion

10.	A body is thrown vertically upwards from the ground. It reaches a maximum height of `20 m` in `5s`. After what time it will reach the ground from its maximum height position ?A. `2.5 s`B. `5s`C. `10s`D. `25s`
Answer» Correct Answer - B

Discussion

11.	If a body starts from rest and travels 120 cm in the 6 second then what is the accelerationA. `0.20 m//s^(2)`B. `0.0027 m//s^(2)`C. `0.218 m//s^(2)`D. `0.03 m//s^(2)`
Answer» Correct Answer - C

Discussion

12.	For a body moving with relativistic speed, if the velocity is doubled, thenA. Its linear momentum is doubledB. Its linear momentum will be less than doubleC. Its linear momentum will be more than doubleD. Its linear momentum remains unchanged
Answer» Correct Answer - C

Discussion

13.	A car moves a distance of `200 m`. It covers the first-half of the distance at speed `40km//h` and the second-half of distance at speed `v km//h`. The average speed is `48km//h`. Find the value of v.A. `56km//h`B. `60 km//h`C. `50km//h`D. `48 km//h`
Answer» Correct Answer - B

Discussion

14.	A train of `150 m` length is going toward north direction at a speed of `10 ms^-1`. A parrot flies at a speed of `5 ms^-1` toward south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to.A. `12s`B. `8s`C. `15s`D. `10s`
Answer» Correct Answer - D

Discussion

15.	An aeroplane flies 400 m north and 300m south and then flies 1200 m upwards then net displacement isA. 1200 mB. 1300mC. 1400 mD. 1500 m
Answer» Correct Answer - A

Discussion

16.	Which of the following velocity-time graphs shows a realistic situation for a body in motion ?A. B. C. D.
Answer» Correct Answer - B

Discussion

17.	Two bodies `A` (of mass `1 kg`) and `B` (of mass `3 kg`) are dropped from heights of `16 m` and `25 m`. Respectively. The ratio of the time taken to reach the ground is :A. `-5//4`B. `12//5`C. `5//12`D. `4//5`
Answer» Correct Answer - D

Discussion

18.	Two balls are dropped from heights `h` and `2h` respectively from the earth surface. The ratio of time of these balls to reach the earth is.A. `1 : sqrt(2)`B. `sqrt(2) :1`C. `2 : 1`D. `1 : 4`
Answer» Correct Answer - A

Discussion

19.	A body sliding on a smooth inclined plane requires `4s` to reach the bottom, starting from rest at the at the top. How much time does it take to cover ont-foruth the distance startion from rest at the top?A. 1sB. 2sC. 4sD. 16s
Answer» Correct Answer - B

Discussion

20.	Two balls `A` and `B` of same size are dropped from the same point under gravity. The mass of `A` is greater than that of `B`.If the air resistance acting on each ball is same, thenA. Heavy ballB. Light ballC. Both simultaneouslyD. Will depends upon the density of the balls
Answer» Correct Answer - C

Discussion

21.	A body falling for 2 seconds covers a distance S equal to that covered in next second. Taking `g = 10m//s^(2),S =`A. `30m`B. `10m`C. `60m`D. `20m`
Answer» Correct Answer - A

Discussion

22.	A ball of mass `m_(1)` and another ball of mass `m_(2)` are dropped from equal height. If the time taken by the balls are `t_(1)` and `t_(2)`, respectively, thenA. `t_(1) = (t_(2))/(2)`B. `t_(1) = t_(2)`C. `t_(1) = 4t_(2)`D. `t_(1) = (t_(2))/(4)`
Answer» Correct Answer - B

Discussion

23.	With what velocity a ball be projected vertically so that the distance covered by it in `5^(th)` second is twice the distance it covers in its `6^(th)` second `(g=10 m//s^(2))`A. `58m//s`B. `49m//s`C. `65m//s`D. `19.6 m//s`
Answer» Correct Answer - C

Discussion

24.	A body starts to fall freely under gravity. The distances covered by it in first, second and third second are in ratioA. `1: 3: 5`B. `1 :2 :5`C. `1: 4: 9`D. `1: 5: 9`
Answer» Correct Answer - A

Discussion

25.	A body falling freely under gravity passes two points 30 m apart in 1 s. find from what point above the upper point it began to fall ? Take g `9.8^(-2)`
Answer» Correct Answer - 32. 1 m

Discussion

26.	A body, thrown upwards with some velocity, reaches the maximum height of 20 m . Another body with double the mass thrown up, with double initial velocity will reach a maximum height ofA. 200mB. 16mC. 80mD. 40m
Answer» Correct Answer - C

Discussion

27.	A body freely falling from the rest has velocity `v` after it falls through a height `h` the distance it has to fall down for its velocity to become double isA. 2hB. 4hC. 6hD. 8h
Answer» Correct Answer - B

Discussion

28.	A body falling from a high mimaret travels 40 meters in the last 2 seconds of its fall to ground. Height of minaret in meters is (take `g=10(m)/(s^2)`)A. 60B. 45C. 80D. 50
Answer» Correct Answer - B

Discussion

29.	An elevator car, whose floor to ceiling distance is equal to `2.7m` starts ascending with constant acceleration of `1.2m//s^(2)`, 2 s after the start, a bolt begins falling from the ceiling of the car. The free fall time of the bolt is `(g=9.8m//s^(2))`A. `sqrt(0.54)s`B. `sqrt(6)s`C. `0.7s`D. `1s`
Answer» Correct Answer - C

Discussion

30.	four balls are dropped from the top of a tower at intervals of one - one secnod. The frist ball reaches the ground after 4s of dropping . What are the distance between first and second , second and third, third and fourth balls at this instant ?
Answer» Correct Answer - 34 . 3 m , 24 . 5 m , 14. 7 m

Discussion

31.	A stone dropped from a building of height `h` and it reaches after `t` second on the earth. From the same building if two stones are thrown (one upwards and other downwards) with the same speed and they reach the earth surface after `t_(1)` and `t_(2)` seconds, respectively, thenA. `t = t_(1)- t_(2)`B. `t = (t_(1) +t_(2))/(2)`C. `t = sqrt(t_(1)t_(2))`D. `t = t_(1)^(2) t_(2)^(2)`
Answer» Correct Answer - D

Discussion

32.	A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is aboutA. 80 mB. 40mC. 20mD. 160m
Answer» Correct Answer - A

Discussion

33.	A stone is dropped from the top of tall tower and one second later another stone is dropped from a balcany 20 m below the top . If both the stones reach the ground at the same instant , determine the height of the tower .take `g = 10 ms^(-2)`
Answer» Correct Answer - 31.25 m

Discussion

34.	A stone is dropped into water from a bridge 44.1 m above the water. Another stone is thrown vertically downward 1 sec later. Both strike the water simultaneously. What was the initial speed of the second stoneA. `12.25 m//s`B. `14.75 m//s`C. `16.23 m//s`D. `17.15 m//s`
Answer» Correct Answer - A

Discussion

35.	A stone falls from a ballon that id descending at a uniform rate of 12m/s. The displacement of the stone from the point of release after 10 sec isA. 490 mB. 510mC. 610 mD. 725m
Answer» Correct Answer - C

Discussion

36.	A stone is dropped from the top of a tower 200 m high. At the same time, another stone is projected vertically upwards from the ground with a velocity of `40m//s`. Calcuate when and where the two stones will mest.
Answer» Correct Answer - 77 . 5 m from top 5 s

Discussion

37.	Statement 1: Rocket in flight is not an illustration of projectile .Statement 2: Rocket takes flight due to combustion of fuel and does not move under the gravity effect alone.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If the assertion and reason both are false
Answer» Correct Answer - A

Discussion

38.	A bus starts from rest with a constant acceleration of `5 ms^(-1)` overtakes andpasses the bus . Find(i) at what distance will the bus overtake the car ? (ii) how fast will the bus be travelling then ?
Answer» Correct Answer - (ii) 1000 m (ii) `100 ms ^(-1)`

Discussion

39.	A positive acceleration of a body can be associated with a slowing down` of the body. Acceleration is a vector quantity.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If the assertion and reason both are false
Answer» Correct Answer - B

Discussion

40.	The acceleration due to gravity on the planet `A` is `9` times the acceleration due to gravity on planet `B`. A man jumps to a height of `2m` on the surface of `A`. What is the height of jump by the same person on the planet `B`?A. 18mB. 6mC. `(2)/(3)m`D. `(2)/(9)m`
Answer» Correct Answer - A

Discussion

41.	An iron ball and a wooden ball of the same radius are released from the same height in vacuum. They take the same time to reach the ground. The reason for this isA. Acceleration due to gravity in vacuum is same irrespective of the size and mass of the bodyB. Acceleration due to gravity in vacuum depends upon the mass of the bodyC. There is no acceleration due to gravity in vacuumD. In vacuum there is a resistance offered to the motion of the body and this resistance depends upon the mass of the body
Answer» Correct Answer - A Acceleration due to gravity is independent of mass and geometry of a body...

Discussion

42.	A body is released from the top of a tower of height h. It takes t sec to reach the ground. Where will be the ball after time `(t)/(2)` sec?A. At `h//2` from the groundB. At `h//4` from the groundC. Depends upon mass and volume of the bodyD. At `3h//4` from the ground
Answer» Correct Answer - D

Discussion

43.	The displacement-time graph of moving particle is shown below The instantaneous velocity of the particle in negative at the pointA. DB. FC. CD. E
Answer» Correct Answer - D

Discussion

44.	The displacement-time graph of moving particle is shown below The instantaneous velocity of the particle in negative at the pointA. DB. FC. CD. E
Answer» Correct Answer - D

Discussion

45.	A particle shows distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point. .A. BB. CC. DD. A
Answer» Correct Answer - B

Discussion

46.	Balls are thrown vertically upwards in such a way that the next ball is thorwn when the previous one is at the maximum height. If the maximum hieght is `5m`, the number of balls thrown per minute will beA. 120B. 80C. 60D. 40
Answer» Correct Answer - C

Discussion

47.	A particle moves in straight line in same direction for 20 seconds with velocity `3 m//s` and the moves with velocity `4 m//s` for another 20 sec and finally moves with velocity `5 m//s` for next 20 seconds. What is the average velocity of the particle?A. `3m//s`B. `4m//s`C. `5m//s`D. Zero
Answer» Correct Answer - B

Discussion

48.	A particle moves along a semicircle of radius `10m` in 5 seconds. The average velocity of the particle isA. `2pi ms^(-1)`B. `4pi ms^(-1)`C. `2ms^(-1)`D. `4ms^(-1)`
Answer» Correct Answer - D

Discussion

49.	A particle when thrown, moves such that it passes from same height at 2 and 10 seconds, then this height h is :A. gB. 2gC. 5gD. 10g
Answer» Correct Answer - D

Discussion

50.	The time taken by a block of wood (initially at rest) to slide down a smooth inclined plane 9.8 m long (angle of inclination is `30^(@)`) is A. `(1)/(2)sec`B. `2sec`C. `4sec`D. `1sec`
Answer» Correct Answer - B

Discussion

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A bus is moving with a speed of `10 ms^-1` on a straight road. A scooterist wishes to overtake the bus in `10 s`. If the bus is at a distance of `1 km` from the scooterist with what speed should the scooterist chase the bus ?A. `20 ms^(-1)`B. `40 ms^(-1)`C. `25 ms^(-1)`D. `10 ms^(-1)`

A particle starts its motion from rest under the action of a constant force. If the distance covered in first `10 s` is `s_1` and the covered in the first `20 s` is `s_2`, then.A. `s_(2) = 2 s_(1)`B. `s_(2) = 3 s_(1)`C. `s_(2) = 4 s_(1)`D. `s_(2) = s_(1)`

A body is moving from rest under constant acceleration and let `S_1` be the displacement in the first `(p - 1)` sec and `S_2` be the displacement in the first `p` sec. The displacement in `(p^2 - p + 1)` sec. will beA. `S_(1) +S_(2)`B. `S_(1)S_(2)`C. `S_(1) -S_(2)`D. `S_(1)//S_(2)`

Water drops fall at regular intervals from a tap 5 m above the ground. The third drop is leaving the tap, the instant the first drop touches the ground. How far above the ground is the second drop at that instant. `(g = 10 ms^-2)`A. `2.50m`B. `3.75 m`C. `4.00m`D. `1.25m`

Velocity-time curve for a body projected vertically upwards is 0 times (s)A. ParabolaB. EllipseC. HyperbolaD. Straight line

A person travels along a straight road for the first half length with a velocity `v_(1) ` and the second half length with velocity ` v_(2)`. What is the mean velocity of the person ?A. `v_(1)v_(2)`B. `(v_(2)^(2))/(v_(1)^(2))`C. `(v_(1)+v_(2))/(2)`D. `(2v_(1)v_(2))/(v_(1)+v_(2))`

A train is moving due east and a car is moving due north with equal speeds. A passenger in the train finds that the car is moving towardsA. East-north directionB. West-north directionC. South-east directionD. None of these

A body is moving with velocity `30 m//s` towards east. After `10 s` its velocity becomes `40 m//s` towards north. The average acceleration of the body is.A. `7m//s^(2)`B. `sqrt(7)m//s^(2)`C. `5m//s^(2)`D. `1m//s^(2)`

A man goes 10 m towards North, then 20 m towards east then displacement isA. 22.5 mB. 25mC. 25.5mD. 30m

A body is thrown vertically upwards from the ground. It reaches a maximum height of `20 m` in `5s`. After what time it will reach the ground from its maximum height position ?A. `2.5 s`B. `5s`C. `10s`D. `25s`

If a body starts from rest and travels 120 cm in the 6 second then what is the accelerationA. `0.20 m//s^(2)`B. `0.0027 m//s^(2)`C. `0.218 m//s^(2)`D. `0.03 m//s^(2)`

For a body moving with relativistic speed, if the velocity is doubled, thenA. Its linear momentum is doubledB. Its linear momentum will be less than doubleC. Its linear momentum will be more than doubleD. Its linear momentum remains unchanged

A car moves a distance of `200 m`. It covers the first-half of the distance at speed `40km//h` and the second-half of distance at speed `v km//h`. The average speed is `48km//h`. Find the value of v.A. `56km//h`B. `60 km//h`C. `50km//h`D. `48 km//h`

A train of `150 m` length is going toward north direction at a speed of `10 ms^-1`. A parrot flies at a speed of `5 ms^-1` toward south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to.A. `12s`B. `8s`C. `15s`D. `10s`

An aeroplane flies 400 m north and 300m south and then flies 1200 m upwards then net displacement isA. 1200 mB. 1300mC. 1400 mD. 1500 m

Which of the following velocity-time graphs shows a realistic situation for a body in motion ?A. B. C. D.

Two bodies `A` (of mass `1 kg`) and `B` (of mass `3 kg`) are dropped from heights of `16 m` and `25 m`. Respectively. The ratio of the time taken to reach the ground is :A. `-5//4`B. `12//5`C. `5//12`D. `4//5`

Two balls are dropped from heights `h` and `2h` respectively from the earth surface. The ratio of time of these balls to reach the earth is.A. `1 : sqrt(2)`B. `sqrt(2) :1`C. `2 : 1`D. `1 : 4`

A body sliding on a smooth inclined plane requires `4s` to reach the bottom, starting from rest at the at the top. How much time does it take to cover ont-foruth the distance startion from rest at the top?A. 1sB. 2sC. 4sD. 16s

Two balls `A` and `B` of same size are dropped from the same point under gravity. The mass of `A` is greater than that of `B`.If the air resistance acting on each ball is same, thenA. Heavy ballB. Light ballC. Both simultaneouslyD. Will depends upon the density of the balls

A body falling for 2 seconds covers a distance S equal to that covered in next second. Taking `g = 10m//s^(2),S =`A. `30m`B. `10m`C. `60m`D. `20m`

A ball of mass `m_(1)` and another ball of mass `m_(2)` are dropped from equal height. If the time taken by the balls are `t_(1)` and `t_(2)`, respectively, thenA. `t_(1) = (t_(2))/(2)`B. `t_(1) = t_(2)`C. `t_(1) = 4t_(2)`D. `t_(1) = (t_(2))/(4)`

With what velocity a ball be projected vertically so that the distance covered by it in `5^(th)` second is twice the distance it covers in its `6^(th)` second `(g=10 m//s^(2))`A. `58m//s`B. `49m//s`C. `65m//s`D. `19.6 m//s`

A body starts to fall freely under gravity. The distances covered by it in first, second and third second are in ratioA. `1: 3: 5`B. `1 :2 :5`C. `1: 4: 9`D. `1: 5: 9`

A body falling freely under gravity passes two points 30 m apart in 1 s. find from what point above the upper point it began to fall ? Take g `9.8^(-2)`

A body, thrown upwards with some velocity, reaches the maximum height of 20 m . Another body with double the mass thrown up, with double initial velocity will reach a maximum height ofA. 200mB. 16mC. 80mD. 40m

A body freely falling from the rest has velocity `v` after it falls through a height `h` the distance it has to fall down for its velocity to become double isA. 2hB. 4hC. 6hD. 8h

A body falling from a high mimaret travels 40 meters in the last 2 seconds of its fall to ground. Height of minaret in meters is (take `g=10(m)/(s^2)`)A. 60B. 45C. 80D. 50

An elevator car, whose floor to ceiling distance is equal to `2.7m` starts ascending with constant acceleration of `1.2m//s^(2)`, 2 s after the start, a bolt begins falling from the ceiling of the car. The free fall time of the bolt is `(g=9.8m//s^(2))`A. `sqrt(0.54)s`B. `sqrt(6)s`C. `0.7s`D. `1s`

four balls are dropped from the top of a tower at intervals of one - one secnod. The frist ball reaches the ground after 4s of dropping . What are the distance between first and second , second and third, third and fourth balls at this instant ?

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is aboutA. 80 mB. 40mC. 20mD. 160m

A stone is dropped from the top of tall tower and one second later another stone is dropped from a balcany 20 m below the top . If both the stones reach the ground at the same instant , determine the height of the tower .take `g = 10 ms^(-2)`

A stone is dropped into water from a bridge 44.1 m above the water. Another stone is thrown vertically downward 1 sec later. Both strike the water simultaneously. What was the initial speed of the second stoneA. `12.25 m//s`B. `14.75 m//s`C. `16.23 m//s`D. `17.15 m//s`

A stone falls from a ballon that id descending at a uniform rate of 12m/s. The displacement of the stone from the point of release after 10 sec isA. 490 mB. 510mC. 610 mD. 725m

A stone is dropped from the top of a tower 200 m high. At the same time, another stone is projected vertically upwards from the ground with a velocity of `40m//s`. Calcuate when and where the two stones will mest.

A bus starts from rest with a constant acceleration of `5 ms^(-1)` overtakes andpasses the bus . Find(i) at what distance will the bus overtake the car ? (ii) how fast will the bus be travelling then ?

The acceleration due to gravity on the planet `A` is `9` times the acceleration due to gravity on planet `B`. A man jumps to a height of `2m` on the surface of `A`. What is the height of jump by the same person on the planet `B`?A. 18mB. 6mC. `(2)/(3)m`D. `(2)/(9)m`

A body is released from the top of a tower of height h. It takes t sec to reach the ground. Where will be the ball after time `(t)/(2)` sec?A. At `h//2` from the groundB. At `h//4` from the groundC. Depends upon mass and volume of the bodyD. At `3h//4` from the ground

The displacement-time graph of moving particle is shown below The instantaneous velocity of the particle in negative at the pointA. DB. FC. CD. E

The displacement-time graph of moving particle is shown below The instantaneous velocity of the particle in negative at the pointA. DB. FC. CD. E

A particle shows distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point. .A. BB. CC. DD. A

Balls are thrown vertically upwards in such a way that the next ball is thorwn when the previous one is at the maximum height. If the maximum hieght is `5m`, the number of balls thrown per minute will beA. 120B. 80C. 60D. 40

A particle moves in straight line in same direction for 20 seconds with velocity `3 m//s` and the moves with velocity `4 m//s` for another 20 sec and finally moves with velocity `5 m//s` for next 20 seconds. What is the average velocity of the particle?A. `3m//s`B. `4m//s`C. `5m//s`D. Zero

A particle moves along a semicircle of radius `10m` in 5 seconds. The average velocity of the particle isA. `2pi ms^(-1)`B. `4pi ms^(-1)`C. `2ms^(-1)`D. `4ms^(-1)`

A particle when thrown, moves such that it passes from same height at 2 and 10 seconds, then this height h is :A. gB. 2gC. 5gD. 10g

The time taken by a block of wood (initially at rest) to slide down a smooth inclined plane 9.8 m long (angle of inclination is `30^(@)`) is A. `(1)/(2)sec`B. `2sec`C. `4sec`D. `1sec`