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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
A body is slipping from an inclined plane of height h and length l . If the angle of inclination is `theta` , the time taken by the body to come from the top to the bottom of this inclined plane isA. `sqrt((2h)/(g))`B. `sqrt((2l)/(g))`C. `(1)/(sin theta) sqrt((2h)/(g))`D. `sin theta sqrt((2h)/(g))` |
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Answer» Correct Answer - C |
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| 52. |
Assertion: The displacement of a body is vector sum of the area under velocity-time graph. Reason: Displacement 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 |
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Answer» Correct Answer - A |
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| 53. |
A mass m slips along the wall of a semispherical surface of radius R . The velocity at the bottom of the surface is A. `sqrt(Rg)`B. `sqrt(2Rg)`C. `2sqrt(pi Rg)`D. `sqrt(piRg)` |
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Answer» Correct Answer - B |
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| 54. |
Assertion: The average velocity of the object over an interval of time is either smaller then or equal to the average speed of the object over the same interval. Reason: Velocity is a vector quantity and speed s a scalar 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 |
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Answer» Correct Answer - A |
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| 55. |
Assertion : Velocity-time graph for an object in uniform motion along a straight path is a straight line parallel to the time axis. Reason : In uniform motion of an object velocity increases as the square of time elapsed.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 |
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Answer» Correct Answer - C |
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| 56. |
A particle is projected up with an initial velocity of `80 ft//sec`. The ball will be at a height of 96ft from the ground afterA. 2.0 and 3.0 secB. Only at 3.0 secC. Only at 2.0 secD. After 1 and 2 sec |
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Answer» Correct Answer - A |
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| 57. |
Assertion: The average speed of a body over a given interval of time is equal to the average velocity of the body in the same interval of time if a body moves in a straight line in one direction. Reason: Because in this case distance travelled by a body is equal to the displacement of the body.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 |
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Answer» Correct Answer - A |
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| 58. |
Assertion : Position-time graph of a stationary object is a straight line parallel to time axis. Reason : For a stationary object, position does not change with time.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 |
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Answer» Correct Answer - A |
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| 59. |
A 210 meter long train is moving due north at a of 25 m/s. a small bird is flying due south a little above the train with speed 5 m/s. The time taken by the bird to cross the train isA. 6sB. 7sC. 9sD. 10s |
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Answer» Correct Answer - B |
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| 60. |
A man throws a ball vertically upward and it rises through 20 m and returns to his hands. What was the initial velocity (u) of the ball and for how much time (T) it remained in the air `[g = 10 m//s^(2)]`A. `u = 10m//s, T = 2s`B. `u = 10m//s, T = 4s`C. `u = 20m//s, T = 2s`D. `u = 20m//s, T = 4s` |
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Answer» Correct Answer - D |
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| 61. |
A body is thrown vertically upwards with a velocity u . Find the true statement from the followingA. Both velocity and acceleration are zero at its highest pointB. Velocity is maximum and acceleration is zero at the highest pointC. Velocity is maximum and acceleration is g downwards at its highest pointD. Velocity is zero at the highest point and maximum height reached is `u^(2)//2g` |
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Answer» Correct Answer - D |
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| 62. |
A body falls freely from the top of a tower. It covers 36 % of the total height in the last second before striking the ground level. The height of the tower isA. `2v_(0)t+(1)/(2)g t^(2)`B. `2v_(0)t`C. `v_(0)t+(1)/(2)g t^(2)`D. `v_(0)t` |
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Answer» Correct Answer - D |
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| 63. |
Assertion: A body,whatever its motion, is always at rest in a frame of reference which is fixed to the body itself. Reason: The relative velocity of a body with respect to itself is zero.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 |
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Answer» Correct Answer - A |
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| 64. |
The velocity of a bullet is reduced from `200 m//s` to `100 m//s` while travelling through a wooden block of thickness `10 cm`. The retardation, assuming it to be uniform, will be.A. `10 xx 10^(4) m//s`B. `12 xx 10^(4) m//s`C. `13.5 xx 10^(4)m//s`D. `15 xx 10^(4)m//s` |
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Answer» Correct Answer - D |
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| 65. |
A 120 m long train is moving in a direction with speed 20 m/s . A traing B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a timeA. 6sB. 36sC. 38sD. None of these |
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Answer» Correct Answer - D |
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| 66. |
A body is moving with uniform acceleration describes 40 m in the first 5 sec and 65 m in next 5 sec. Its initial velocity will beA. `4m//s`B. `2.5 m//s`C. `5.5 m//s`D. `11m//s` |
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Answer» Correct Answer - C |
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| 67. |
A body A moves with a uniform acceleration a and zero initial velocity. Another body B, starts from the same point moves in the same direction with a constant velocity v. The two bodies meet after a time t. The value of t isA. `(2v)/(a)`B. `(v)/(a)`C. `(v)/(2a)`D. `sqrt((v)/(2a))` |
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Answer» Correct Answer - A |
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| 68. |
A car accelerates from rest at a constant rate `alpha` for some time, after which it decelerates at a constant rate `beta,` to come to rest. If the total time elapsed is t seconds. Then evalute (a) the maximum velocity reached and (b) the total distance travelled.A. `((alpha^(2) + beta^(2))/(alpha beta))t`B. `((alpha^(2) - beta^(2))/(alpha beta))t`C. `((alpha+beta)t)/(alpha beta)`D. `((alpha beta t)/(alpha+beta))` |
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Answer» Correct Answer - D |
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| 69. |
A car accelerates from rest at a constant rate `alpha` for some time, after which it decelerates at a constant rate `beta,` to come to rest. If the total time elapsed is t seconds. Then evalute (a) the maximum velocity reached and (b) the total distance travelled.A. `((alpha^(2)+beta^(2))/(alpha beta))t`B. `((alpha^(2)-beta^(2))/(alpha beta))t`C. `((alpha+beta)t)/(alpha beta)`D. `(alpha betat)/(alpha +beta)` |
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Answer» Correct Answer - B |
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| 70. |
A body is moving according to the equation `x = at +bt^(2) - ct^(3)` where x = displacement and a,b and c are constants. The acceleration of the body isA. `a +2bt`B. `2b +6ct`C. `2b - 6ct`D. `3b - 6ct^(2)` |
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Answer» Correct Answer - C |
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| 71. |
A police jeep is chasing with, velocity of `45 km//h` a thief in another jeep moving with velocity `153 km//h`. Police fires a bullet with muzzle velocity of `180 m//s`. The velocity it will strike the car of the thief is.A. `150 m//s`B. `27 m//s`C. `450 m//s`D. `250 m//s` |
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Answer» Correct Answer - A |
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| 72. |
A body covers one-third of its jurney with speed `v_(1)`, next one-third with speed ` v_(2)` and last one-third with speed `v_(3)`. Calcuate the average dpeed of the during the entire journey.A. `(v_(1)v_(2)+v_(2)v_(3)+v_(3)v_(1))/(v_(1)+v_(2)+v_(3))`B. `(v_(1)+v_(2)+v_(3))/(3)`C. `(v_(1)v_(2)v_(3))/(v_(1)v_(2)+v_(2)v_(3)+v_(3)v_(1))`D. `(3v_(1)v_(2)v_(3))/(v_(1)v_(2)+v_(2)v_(3)+v_(3)v_(1))` |
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Answer» Correct Answer - D |
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| 73. |
The displacement of the particle varies with time according to the relation `x=(k)/(b)[1-e^(-ht)]` . Then the velocity of the particle isA. `k(e^(-bt))`B. `(k)/(b^(2)e^(-bt)0`C. `kbe^(-bt)`D. None of these |
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Answer» Correct Answer - A |
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| 74. |
The acceleration of a particle starting from rest, varies with time according to the relation`A=-aomegasinmegat.`. The displacement of this particle at a time t will beA. `-(1)/(2)(aomega^(2)sinomegat)t^(2)`B. `aomegasinomegat`C. `aomegacosomegat`D. `a(sinomegat)/omega -at` |
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Answer» Correct Answer - D |
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| 75. |
Assertion : The displacement-time graph of a body moving with uniform acceleration is a straight line. Reason : The displacement is proportional to time for uniformly accelerated motion.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 |
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Answer» Correct Answer - D |
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| 76. |
The displacement-time graph for two particles A and B are straight lines inclined at angles of `30^(@)` and `60^(@)` with the time axis. The ratio of velocities of `V_(A) :V_(B)` isA. `1:2`B. `1:sqrt(3)`C. `sqrt(3):1`D. `1:3` |
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Answer» Correct Answer - D |
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| 77. |
A boy walks to his school at a distance of `6 km ` with constant speed of ` 2.5 km h^(-1)` and walks back with a constant speed of ` 4 km h^(-1)`. What is avetage speed for the round trip in `km h^(-1)` ?A. `24//13`B. `40//13`C. 3D. `1//2` |
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Answer» Correct Answer - B |
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| 78. |
A particle starting from rest travels a distance x in first 2 seconds and a distance y in next two seconds, thenA. `y = x`B. `y = 2x`C. `y = 3x`D. `y = 4x` |
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Answer» Correct Answer - C |
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| 79. |
The engine of a car produces acceleration `4m//s^(2)` in the car. If this acr pulls another car of same mass, what will be the acceleration producedA. `8m//s^(2)`B. `2m//s^(2)`C. `4m//s^(2)`D. `(1)/(2)m//s^(2)` |
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Answer» Correct Answer - B |
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| 80. |
Two balls `A and B` of same masses are thrown from the top of the building `A`. Thrown upward with velocity `V and B`, thrown downward with velocity `V`, thenA. Velocity of A is more than B at the groundB. Velocity of B is more than A at the groundC. Both A & B strike the ground with same velocityD. None of these |
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Answer» Correct Answer - C |
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| 81. |
from the top of multi-storeyed building ,39.2 m tall , a boy projects a stone vertically upward with an initial velocity of `9.8 ms^(-1)` such that it finally drops to the gorund (i) when will the stone reach the ground? (ii) whn will it pass through the point of projection ? (iii) what will be its velocity before striking the ground ? take g =`10ms^(-1)` |
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Answer» Correct Answer - 4s 2s , `29 . 4 ms ^(-1)` |
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| 82. |
The velocity-time graph of a body moving in a straight line is shown in Fig. Find the displacement and the distance travelled by the body in ` 6 seconds`. .A. `8m, 16m`B. `16m, 8m`C. `16m,16m`D. `8m,8m` |
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Answer» Correct Answer - A |
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| 83. |
A car A is moving with is speed of `60kmh^(-1)` an car B is moving with a speed of `75 kmh^(-1)` ,along parallel straight paths , starting paths starting from the same point. What is the position of car A w.r.t B after 20 minutes ? |
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Answer» Correct Answer - 5 km behind |
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| 84. |
Assertion: The slope of displacement-time graph of a body moving with high velocity is steeper than the slope of displacement-time graph of a body with low velocity. Reason: Slope of displacement-time graph = Velocity of the body.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 |
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Answer» Correct Answer - A |
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| 85. |
If a car at rest, accelerates uniformly to a speed of `144 km//h` in `20s`, it covers a distance ofA. `2880m`B. `1440 m`C. `400 m`D. `20m` |
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Answer» Correct Answer - C |
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| 86. |
A car A is travelling on a straight level road with a uniform speed of 60 km/h. It is followed by another car B which in moving with a speed of 70 km/h. When the distance between then is 2.5km, the car B is given a deceleration of `20(km)/(h^2)`. After how much time will B catch up with A |
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Answer» Correct Answer - 32. 5 km , 0. 5 h |
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| 87. |
a driver of a car travelling at `52 km//h` applies the brakes and acceleration uniformly in the opposite direction. The car stops in `5 s`. Another driver going at `34 km//h` in another car applies his brakes slowly and stops in `10 s`. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied ? |
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Answer» Correct Answer - second car travelled farther |
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| 88. |
One car moving on a staright road covers one-third of the distance with 20 `(km)/(hr)` and the rest with 60 `(km)/(hr)`. The average speed isA. `40 km//hr`B. `80 km//hr`C. `46(2)/(3)km//hr`D. `36 km//hr` |
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Answer» Correct Answer - D |
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| 89. |
A car is moving along a straight road with a uniform acceleration. It passes through two points P and Q separated by a distance with velocity `30km//h` and `40 km//h` respectively. The velocity of the car midway between P and Q isA. `33.3 km//h`B. `20sqrt(2)km//h`C. `25 sqrt(2) km//h`D. `0.35 km//h` |
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Answer» Correct Answer - C |
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| 90. |
A thief is running away on a straight road in a moving with a speed of `9 ms^(-1)`. A policeman chases him on a motor cycle moving at a speed of `10 ms^(-1)`. If the instantaneous separation of the jeep from the motor cycle is `100 m`, how long will it take for the policeman to catch the thief ?.A. 1sB. 19sC. 90sD. 100s |
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Answer» Correct Answer - D |
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| 91. |
A car A is travelling on a straight level road with a uniform speed of 60 km/h. It is followed by another car B which in moving with a speed of 70 km/h. When the distance between then is 2.5km, the car B is given a deceleration of `20(km)/(h^2)`. After how much time will B catch up with AA. 1 hrB. 1/2 hrC. 1/4 hrD. 1/8 hr |
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Answer» Correct Answer - B |
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| 92. |
Statement-1 : The relative velocity between any two bodies moving in opposite direction is equal to sum of the velocities of two bodies. Statement-2 : Sometimes relative velocity between two bodies is equal to difference in velocities of the two.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 |
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Answer» Correct Answer - B |
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| 93. |
balloon is rising vertically up with a velocity of 29 m/s. A stone is dropped from it and it reaches the ground in 10 seconds. The height of the balloon when the stone was dropped from it is `(g = 9.8 m/s^2)`A. 100mB. 200mC. 400mD. 150m |
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Answer» Correct Answer - B |
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| 94. |
A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground isA. `(v)/(g) +(2hg)/(sqrt(2))`B. `(v)/(g)[1-sqrt(1+(2h)/(g))]`C. `(v)/(g) [1+sqrt(1+(2gh)/(v^(2)))]`D. `(v)/(g) [1+sqrt(v^(2)+(2g)/(h))]` |
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Answer» Correct Answer - C |
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| 95. |
Two trains one of length 100m and another of length 125 m, are moving in mutually opposite directions along parallel lines, meet each other. Each with speed 10 m/s. If their acceleration are `0.3(m)/(s^2)` and `0.2(m)/(s^2)` respectively, then the time they take to pass each other will beA. `sqrt(3)u`B. `sqrt(5)u`C. `sqrt(11)u`D. `sqrt(7)u` |
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Answer» Correct Answer - B |
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| 96. |
An object is projected upwards with a velocity of `100m//s`. It will strike the ground after (approximately)A. 10secB. 20secC. 15secD. 5sec |
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Answer» Correct Answer - B |
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| 97. |
A stone thrown upwaords from the top of tower 85 m high , reches the ground in 5 s. find (i) the greatest heigth above the ground (ii) the velocity with which it reaches the gorund and (iii) the time taken to reach the maximum height . Take g =` 10ms ^(-2)`? |
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Answer» Correct Answer - 88. 2 m (ii) ` 42 ms^(-1)` (iii) 0. 8 s |
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| 98. |
A body is dropped from the top a towar 150 m, and sumultaneously, another body is dropped from rest from rest from a point 100m above the gorund. What is their differnece in height after they have fallan (i) 2 s(ii) 3s.how does the difference in height vary with time ? take g `10 ms^(-2)` |
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Answer» Correct Answer - 50 m difference in height remains constant at 50 m |
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| 99. |
A ball is thrown vertically upwards from the top of a tower at `4.9 ms^(-1)` . It strikes the pond near the base of the tower after 3 seconds . The height of the tower isA. `73.5 m`B. `4.41m`C. `29.4m`D. None of these |
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Answer» Correct Answer - C |
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| 100. |
A body is thrown vertically up from the top fo atower with a velocity of `5 ms ^(-1)` . It reaches the gorund after 5 s. find the heigth of the tower |
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Answer» Correct Answer - 273 . 6 m |
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