System of Particles and Rotational Motion Test

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System of Particles and Rotational Motion Test - 5

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Question 1
1 / -0

An ant is running on the periphery of a round circular table rotating at uniform rate. The ant will not experience,

A
tangential velocity

B
tangential acceleration

C
force

D
centripetal acceleration

Solution

A body undergoing a uniform circular motion has no tangential acceleration but only has centripetal acceleration
Question 2
1 / -0

The tangential component of the acceleration in a uniform circular motion is,

A
Zero

B
Infinite

C
Some value greater than zero

D
there’s no tangential component in uniform circular motion

Solution

The tangential component of acceleration of a body in a uniform circular motion is always equal to zero.

The speed of the object remains constant during the uniform circular motion. The word uniform refers to the speed that remains constant throughout.
Question 3
1 / -0

Which of the following statement is true about a body that undergoes a uniform circular motion,

A
The speed of the object varies with time

B
The direction of velocity vector of the object varies at different position.

C
The direction of the force acting on the body is directed towards the center of the circular path

D
The angular velocity at all point on a rigid uniform rotating body varies with the radial position.

Solution

Option C is the correct answer as only centripetal acceleration is acting on the body in uniform circular motion, and it is always directed towards the center of the circular path

Option A is incorrect. The speed during the circular motion do not vary with time. It remains constant.

Option C is not correct. The direction of velocity vector remains constant, and it is always in the tangential direction.

Option D is incorrect. The angular velocity at every point for a rigid body remains same.