Work Done by Forces on a Simple Pendulum · CAP 2008 #Q2
Physics · mechanics
Problem
As a simple pendulum swings back and forth, the forces acting on the suspended object may produce positive work, negative work or produce no work. Which of the forces if any from the listed three below does no work on the pendulum?
(a) Tension.
(b) Air resistance.
(c) Gravitational force.
(d) All the forces above do no work on the pendulum.
(e) All the forces above do work on the pendulum.