2. As a pendulum swings, its energy is constantly converted between kinetic

energy and potential energy. At which point in its swing does a pendulum have

the greatest potential energy and the least kinetic energy? *

O

A. at point F

O

B. at point G

O

C. at point H

O

D. at point J

answer fast

at point F

Explanation:

To know the point in which the pendulum has the greatest potential energy you can assume that the zero reference of the gravitational energy (it is mandatory to define it) is at the bottom of the pendulum.

Then, when the pendulum reaches it maximum height in its motion the gravitational potential energy is

U = mgh

m: mass of the pendulum

g: gravitational constant

The greatest value is obtained when the pendulum reaches y=h

Furthermore, at this point the pendulum stops to come back in ts motion and then the speed is zero, and so, the kinetic energy (K=1/mv^2=0).

A) answer, at point F