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1.5 Forces

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Question 92

An object is in mechanical equilibrium. Which statement correctly and completely describes the conditions required for this state?

A

There are no external forces or torques acting on the object.

B

The net (resultant) force acting on the object is zero, and the net (resultant) torque (turning effect) about any point is zero.

C

The object must be completely at rest and cannot be in motion.

D

The sum of the clockwise moments about any pivot must be equal to the sum of the anticlockwise moments about that pivot, regardless of any net translational force.

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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