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1.

Which one of the following is not the vector quantity?A. SpeedB. VelocityC. torqueD. Displaecment

Answer» Correct Answer - a
Discussion
2.

The angles between the two vectors `vecA=3hati+4hatj+5hatk` and `vecB=3hati+4hatj-5hatk` will beA. `0^(@)`B. `45^(@)`C. `90^(@)`D. `180^(@)`

Answer» Correct Answer - c
Discussion
3.

the circular motion of a particle with constant speed isA. Simple harmonic but not periodicB. Periodic and simple harmonicC. neither periodic nor simple harmonicD. periodic but not simple harmonic

Answer» Correct Answer - d
Discussion
4.

9.8m/sA. 10 m/sB. 5.8m/sC. 17.3m/sD.

Answer» Correct Answer - d
Discussion
5.

If a unit vector is represented by `0.5hati + 0.8hatj + chatk` the value of c isA. 1B. `sqrt(0.11)`C. `sqrt(0.01)`D. 0.39

Answer» Correct Answer - b
Discussion
6.

Person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of `0.5ms^(-1)` at an angle of `120^(@)` with the direction of flow of water.The speed of water in the stream isA. 1.0m/sB. 0.5m/sC. 0.25m/sD. 0.43m/s

Answer» Correct Answer - c
Discussion
7.

A missile is fired for maximum range with an initial velocity of `20m//s`. If `g=10m//s^(2)`, the range of the missile isA. 50 mB. 60 mC. 20 mD. 40 m

Answer» Correct Answer - d
Discussion
8.

A body is whirled in a horizontal circle of radius `20cm`. It has an angular velocity of `10rad//s`. What is its linear velocity at any point on the circular pathA. `sqrt(2)m//s`B. 2 m/sC. 10 m/s, 10 m/sD. 20 m/s

Answer» Correct Answer - b
Discussion
9.

When milk is churned, cream gets separated due toA. Centripetal forceB. Centrifugal forceC. friction forceD. Gravititional force

Answer» Correct Answer - b
Discussion
10.

the resultant of A x 0 will be equal toA. zeroB. AC. Zero vectorD. unit vector

Answer» Correct Answer - c
Discussion
11.

A boat crosses a river with a velocity of `8(km)/(h)`. If the resulting velocity of boat is `10(km)/(h)` then the velocity of river water isA. `12.8kmh^(-1)`B. `6kmh^(-1)`C. `8kmh^(-1)`D. `10kmh^(-1)`

Answer» Correct Answer - b
Discussion
12.

The maximum range of a gun from horizontal terrain is `16 km`. If `g = 10 m//s^(2)` what must be the muzzle velocity of the shell?A. `160ms^(-1)`B. `200sqrt(2)ms^(-1)`C. `400ms^(-1)`D. `800ms^(-1)`

Answer» Correct Answer - c
Discussion
13.

If a vector `2hat(i)+3hat(j)+8hat(k)` is perpendicular to the vector `4hat(j)-4hat(i)+alpha hat(k)`. Then the value of `alpha` isA. -1B. `(1)/(2)`C. `-(1)/(2)`D. 1

Answer» Correct Answer - c
Discussion
14.

A stone is attached to one end of a straing and roteted in verticle cricle .If string breaks at the position of maximum tension, will break at A. AB. BC. CD. D

Answer» Correct Answer - b
Discussion
15.

A particle moves along a circle if radius (20 //pi) m with constant tangential acceleration. If the velocity of the particle is ` 80 m//s` at the end of the second revolution after motion has begun the tangential acceleration is .A. `160pim//s^(2)`B. `40pim//s^(2)`C. `40pim//s^(2)`D. `640pim//s^(2)`

Answer» Correct Answer - b
Discussion