Question

A particle is moving in a circle with uniform speed v. In moving from a point to another diametrically opposite point

• A. The momentum changes by mv
• B. The momentum changes by 2mv
• C. The kinetic energy changes by $\left(\frac{1}{2}\right)m{v}^2$
• D. The kinetic energy changes by $m{v}^2$

Answer 1

The correct option is B

The momentum changes by 2mv

Momentum changes by 2mv but kinetic energy remains same.