A body moving in a circular path with a const | vedclass

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Question

(B) In uniform circular motion,the speed of the body remains constant,but the direction of motion changes at every point along the path.Since velocity

Vedclass · Accepted Answer

kinetic energy

Vedclass · Answer

(B) In uniform circular motion,the speed of the body remains constant,but the direction of motion changes at every point along the path.Since velocity $\vec{v}$ is a vector quantity,its direction changes continuously,so velocity is not constant.Since momentum $\vec{p} = m\vec{v}$ depends on the velocity vector,it also changes continuously.Acceleration in uniform circular motion is centripetal acceleration,given by $a_c = \frac{v^2}{r}$. Although its magnitude is constant,its direction is always towards the center of the circle,which changes continuously. Thus,acceleration is not constant.Kinetic energy is given by $K = \frac{1}{2}mv^2$. Since mass $m$ and speed $v = |\vec{v}|$ are constant,the kinetic energy remains constant throughout the motion.Therefore,the correct option is kinetic energy.

$A$ body moving in a circular path with a constant speed has constant:

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