select the correct locations on the image. mechanical energy is the sum of an objects potential energy and…

select the correct locations on the image. mechanical energy is the sum of an objects potential energy and kinetic energy. consider the positions of this swinging pocket watch. at which positions will the potential energy be the highest? assume the pendulum can swing forever (ignore friction).

select the correct locations on the image. mechanical energy is the sum of an objects potential energy and kinetic energy. consider the positions of this swinging pocket watch. at which positions will the potential energy be the highest? assume the pendulum can swing forever (ignore friction).

Answer

Answer:

The positions at the two extreme - ends of the swing.

Explanation:

Step1: Recall energy conservation

Mechanical energy $E = PE+KE$ is conserved.

Step2: Analyze kinetic and potential energy

At the extreme - ends, the velocity $v = 0$, so $KE=\frac{1}{2}mv^{2}=0$. Since $E$ is constant, when $KE = 0$, $PE$ is maximum.