Motion In a Plane MCQs for NEET

1 A body is moving along a circle with an increasing speed. It possesses?

A centripetal acceleration only (ac)

B tangential acceleration only (ar)

C both tangential and centripetal acceleration (ar and ac)

D No acceleration

Answer:both tangential and centripetal acceleration (ar and ac)

2 A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s². The acceleration of the car is

A 2 m/s²

B 9.8 m/s²

C 1.8 m/2

D 2.7 m/s²

View Answer

Answer:2.7 m/s²

3 The centripetal component of acceleration arises when?

A The direction of motion is changed.

B The direction propagation is changed.

C The direction of gravity is changed.

D The direction of projectile is changed.

View Answer

Answer:The direction of motion is changed.

4 One radian is defined to be the angle subtended where the arc length S is exactly equal to the?

A radius of the circle.s

B diameter of the circle.

C circumference of the circle.

D half of radius of the circle.

View Answer

Answer:radius of the circle.s

5 When angular velocity changes with respect to time then?

A an angular acceleration is produced

B a linear acceleration is produced

C it constitute a couple

D a linear velocity is produced

View Answer

Answer:an angular acceleration is produced

6 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?

A 2 cm

B 6 cm

C 16 cm

D 4 cm

View Answer

Answer:2 cm

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

A has an inward acceleration

B has constant velocity.

C has no acceleration

D has an outward radial acceleration

View Answer

Answer:has an inward acceleration

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

A 440

B 420

C 430

D 450

View Answer

Answer:450

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

A Angular acceleration

B Angular Distance.

C Angular Displacement.

D torque

View Answer

Answer:Angular Displacement.

10 When a body P moves on a circular path, the centripetal acceleration is

A directed inwards from P, to the centre of the circle

B directed tangential to the circumference of the circle, at P

C directed perpendicular to the planc of the circle, at P

D directed outward, perpendicular to the circumference of the circle

View Answer

Answer:directed inwards from P, to the centre of the circle

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

A angular momentum remains constant

B linear momentum remains constant

C angular velocity remains constant

D total mechanical energy remains constant

View Answer

Answer:total mechanical energy remains constant

12 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

A 7 m

B 1 m

C 5 m

D 1 . 2 m

View Answer

Answer:5 m.

13 A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be

A 4 sec

B 10 sec

C 8 sec

D 1 sec

View Answer

Answer:4 sec

14 The path of a particle is given by the expression y = at + bt², where a and b are constants . Y is the displacement at time t. Its velocity at any instant is given by

A a + 2bt

B zero

C 2bt

D at

View Answer