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1.5 Forces

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Question 33

A dump truck carries a heavy load of gravel to a construction site. After unloading the gravel, the truck drives away empty.

a.

Compare the acceleration of the full truck with the acceleration of the empty truck for the same resultant force. Choose the correct statement:

  • The acceleration of the full truck is less than the acceleration of the empty truck.
  • The acceleration of the full truck is the same as the acceleration of the empty truck.
  • The acceleration of the full truck is more than the acceleration of the empty truck.
[1]
b.

Explain your answer.

[2]
c.

The empty dump truck has a weight of 60 000 N60\,000\text{ N}60000 N. When driving away, the engine provides a forward force of 12 000 N12\,000\text{ N}12000 N and the total resistive force opposing the motion is 3 000 N3\,000\text{ N}3000 N.

Taking the acceleration of free fall g=10 m/s2g = 10\text{ m/s}^2g=10 m/s2, calculate the acceleration of the empty truck.

[3]
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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