AP BIOLOGY

Detailed explanation-1: -The ball at the top of the swing is briefly motionless. It has the greatest potential energy, because it is highest above the surface. At every point in the swing, the system of the ball on the pendulum string has the same total amount of energy.

Detailed explanation-2: -What are the factors that determine how much kinetic energy an object has? The girl on the swing has the most potential energy just as she is being pushed because she is at the highest position at this point.

Detailed explanation-3: -The energy possessed by a body in motion is kinetic energy.

Detailed explanation-4: -When a girl stands up on a swing, the position of the center of mass of the girl is raised. Due to this the effective length of the pendulum decreases, hence the time period of the swing decreases.