Question

A pendulum swings back and forth and has a kinetic energy of 400 j at a particular point in its path. Which of the following is not true

A- both the kinetic and potential energy are decreasing

B- the minimum kinetic energy is zero

C- when the kinetic energy is zero, the potential energy will be 400 J

D- the potential energy increases when the kinetic energy decreases

Answer 1

Choice-A is definitely not true. Not ever, never, for a pendulum.

Choice-C may be true but not necessarily.

Choices B and D are always true for a pendulum.