AS Physics 1.2 Keywords
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Newton First law (2 marks)
- An object continues in its state of rest or in uniform motion in a straight line unless acted upon by an external force.
- Resultant force is equal to zero.
Free body diagram
A diagram which shows all the forces acting on a body
Centre of gravity
The single point at which the weight of an object appears to act
Centre of mass
the point at which all the object mass may be considered to be concentrated
Newton third law
If body A exerts a force on body B, body B exerts a force of the same size on body A, but in the opposite direction
When an object has balanced forces acting on it
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