A) Both momentum and kinetic energy of the particle are not constant.
B) Both momentum and kinetic energy of the particle are constant.
C) Kinetic energy changes but the momentum remains constant.
D) The momentum changes but kinetic energy remains constant.
Correct Answer: D
Solution :
[d] \[\frac{1}{2}m{{V}^{2}}=KE\] Since speed does not change, the KE remains same. Due to change in the direction of motion, momentum changes.
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