A simple pendulum of mass m moves along an arc pf a circle radius R…

Physics JAMB 1989

A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree

  • mgR sinΞΈ
  • MgR (1- cos ΞΈ) checkmark
  • mgR
  • mgR (1 - sinΞΈ)

The correct answer is: B

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