Class 11

8. Work, Energy And Power & Collision question bank (Physics)

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Q1.

A particle moves with a uniform speed \(v\) and time period \(T\) in a circular path of radius \(r\). If the speed of the particle is doubled, its new time period is

(A)
\(T\)
(B)
\(\dfrac{T}{2}\)
(C)
\(2T\)
(D)
\(\dfrac{T}{4}\)
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Q2.

In uniform circular motion, the centripetal acceleration is

(A)
towards the centre of the circular path and perpendicular to the instantaneous velocity
(B)
a constant acceleration
(C)
away from the centre of the circular path and perpendicular to the instantaneous velocity
(D)
a variable acceleration making \(45^\circ\) with the instantaneous velocity
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