OCR GCSE Combined Science A · J250
Specification P2.2k · Physics Paper 1
Revise: Momentum and CollisionsFriction from the track is an example of an external force because it comes from outside the chosen pair.
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GCSE Combined Science · key term
A force exerted on a system by something outside that system.
Used by OCR
Specification P2.2k · Physics Paper 1
Revise: Momentum and CollisionsFriction from the track is an example of an external force because it comes from outside the chosen pair.
Physics, Combined Science
Revise: Momentum, Collisions and ForceThe contact forces between them act within that system; friction from the surface is an external force because it comes from outside the system.
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