Additional Science EXAM: B4,C4,P4

Revision Cards to revise and memories from ;)

  • Created by: Amber
  • Created on: 19-05-11 20:05

Explaining Motion

Interactions and Forces

Forces happen because of an interaction between two objects. They happen in pairs.

  • the two forces in an interaction pair are always the same size.
  • the two forces in an interaction pair act in opposite directions.
  • the two forces in an interaction pair act on a different object.

Resultant Force

This is the first law of motion:

If the resultant force acting on an object is zero, its momentum will stay the same.

This means that a stationary object will stay where it is. It will not start moving if there is no resultant force. A moving object will carry on at the same speed. In both cases the momentum does not change because the resultant force is zero.

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the first part was useful, it would of been better if you had made more notes on speed etc :)

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