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1.5 Forces

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Question 90

A rocket is travelling vertically upwards. Three vertical forces act on it:

  • The thrust acts upwards and is equal to 150 000 N150\,000\text{ N}150000 N.
  • The weight acts downwards and is equal to 110 000 N110\,000\text{ N}110000 N.

What is the air resistance force acting on the rocket when it is travelling upwards at constant speed?

A

40 000 N40\,000\text{ N}40000 N downwards

B

40 000 N40\,000\text{ N}40000 N upwards

C

260 000 N260\,000\text{ N}260000 N downwards

D

260 000 N260\,000\text{ N}260000 N upwards

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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