MHT CET · Physics · Motion In Two Dimensions
A body moving in a circular path with a constant speed, it has constant
- A momentum
- B kinetic energy
- C acceleration
- D velocity
Answer & Solution
Correct Answer
(B) kinetic energy
Step-by-step Solution
Detailed explanation
We can see that direction of velocity and acceleration change continuously.
\(\therefore\) both are not constant.
Momentum is \(p=m \vec{v}\) which depends on velocity and changes with velocity. The only quantities, the speed \(|\vec{v}|\) and the kinetic energy is \(\frac{1}{2} m|\vec{v}|^2\) are constant during uniform circular motion.
Therefore, the answer is kinetic energy.
\(\therefore\) both are not constant.
Momentum is \(p=m \vec{v}\) which depends on velocity and changes with velocity. The only quantities, the speed \(|\vec{v}|\) and the kinetic energy is \(\frac{1}{2} m|\vec{v}|^2\) are constant during uniform circular motion.
Therefore, the answer is kinetic energy.
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