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1.5 Forces

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Question 58

Which of the following options correctly describes the necessary conditions for a rigid body to be in mechanical equilibrium?

A

The net external force acting on the body is zero, and it must be at rest.

B

The net external torque (turning effect) acting on the body about any axis is zero.

C

Both the net external force and the net external torque acting on the body must be zero.

D

There are absolutely no internal or external forces acting on the body.

Markscheme

1.5 Forces Questions

  1. IGCSE
  2. /Physics
  3. /1.5 Forces

245 exam-style questions on CIE IGCSE Physics 1.5 Forces, covering 1.5.1a Forces, resultant force and motion, 1.5.1b Load–extension graphs and the spring constant, 1.5.1c Friction and drag, 1.5.1d Force, mass and acceleration, 1.5.1e Motion in a circular path, 1.5.2a Moment of a force, 1.5.2b Principle of moments and equilibrium, and 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.

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