A body moving in a circular path with a constant speed has a ___
Options:
A . constant velocity
B . constant momentum
C . constant kinetic energy
D . constant acceleration
Answer: Option C : C We can see that direction of velocity and acceleration changes continuously ∴ Both are not constant. Momentum is m.⃗v which depends on velocity and changes with velocity. The only quantity that is constant is speed and kinetic energy is 12m|⃗v|2 where|⃗v| is the speed. ∴ Answer is kinetic energy.
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