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Edexcel IGCSE Physics 1 28p Force and Momentum Change Questions

Practise applying force, time and momentum change to impacts, turbines, engines and collisions, including directions and unit conversions.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • calculate mean force from F = change in momentum / time using contact time in seconds
  • find time or change in velocity by rearranging the force and momentum equation
  • state the force direction from the direction of the momentum change

Edexcel IGCSE Physics 1 28p Force and Momentum Change Questions question 1

[Maximum number: 3]

The diagram shows a child's toy for accelerating steel balls.

Figure for Question Edexcel IGCSE Physics 1 28p Force and Momentum Change Questions question 1 — Edexcel IGCSE Physics

This is how the toy works.
- the toy uses three identical steel balls, each with a mass of 4.1 g
- ball A moves towards the magnet
- ball B is in contact with the magnet
- balls B and C are initially at rest and are in contact with each other
- when ball A collides with the magnet, ball C moves away from the magnet

When ball A collides with the magnet, a force of 1.3 N is exerted on ball C for a time of 0.0025 s.

This causes ball C to move away from the magnet.

Calculate the change in velocity of ball C due to this force.

change in velocity = ............ m/s

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