Question

at which point or points does the pendulum have the greatest kinetic energy? a only b only c only both a and c

Explanation:

Step1: Recall kinetic - energy formula

The kinetic energy formula is $K = \frac{1}{2}mv^{2}$, where $m$ is mass and $v$ is velocity.

Step2: Analyze pendulum motion

A pendulum has maximum velocity at its lowest - point. Point B is the lowest point of the pendulum's swing. At points A and C, the pendulum is at its maximum height and has zero velocity (momentarily stops before changing direction), so kinetic energy is zero at A and C. At point B, velocity is maximum, so kinetic energy is maximum.

Answer:

B. B only