Check up the only correct statement in the following :-
Check up the only correct statement in the following :-
- A
A body has a constant velocity and still it can have a varying speed.
- B
A body has a constant speed but it can have a varying velocity.
- C
A body having constant speed cannot have any acceleration.
- D
A body in motion under a force acting upon it must always have work done upon it.
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An object of mass $m$ moves with constant speed in a circular path of radius $R$ under the action of a force of constant magnitude $F$. The kinetic energy of object is ............
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- [IIT 1992]
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As shown in the figure, a particle is moving with constant speed $\pi\,m / s$. Considering its motion from $A$ to $B$, the magnitude of the average velocity is:
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- [JEE MAIN 2023]