R4RIN – MCQs, Mock Tests | CBES Board Class 11 Physics Chapter 4 Motion in a Plane

The angular velocity depends upon the rate of change of the?

1. Angular acceleration
2. Angular Distance
3. Angular Displacement
4. torque

✅ Correct Answer: 3

A small body attached at the end of an inextensible string completes a vertical circle, then its

1. angular momentum remains constant
2. linear momentum remains constant
3. angular velocity remains constant
4. total mechanical energy remains constant

✅ Correct Answer: 4

A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is

1. 440
2. 420
3. 430
4. 450

✅ Correct Answer: 4

A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. Its resultant displacement from O

1. 7 m
2. 1 m
3. 5 m
4. 1 . 2 m

✅ Correct Answer: 3

A body is traveling in a circle at constant speed. It

1. has an inward acceleration
2. has constant velocity
3. has no acceleration
4. has an outward radial acceleration

✅ Correct Answer: 1

A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip?

1. 2 cm
2. 6 cm
3. 16 cm
4. 4 cm

✅ Correct Answer: 1

The total flight requires a time that is?

1. four times the time necessary to reach the maximum height.
2. thrice the time necessary to reach the maximum height
3. equal to the time necessary to reach the maximum height.
4. twice the time necessary to reach the maximum height

✅ Correct Answer: 4

The centripetal component of acceleration arises when?

1. The direction of motion is changed.
2. The direction propagation is changed.
3. The direction of gravity is changed.
4. The direction of projectile is changed.

✅ Correct Answer: 1

One radian is equal to?

1. (a) 57.7o
2. 53.7o
3. 59.3o
4. 57.3o

✅ Correct Answer: 4