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GCSE Combined Science · key term
An object remains at rest or continues moving with constant velocity unless acted on by a non-zero resultant force.
Used by AQA and OCR
Specification 4.7.1.5 · Paper 3, Paper 4
If the resultant force on an object is zero, a stationary object remains stationary and a moving object continues at the same speed in the same direction.
Specification P2.2d · Physics Paper 1
Newton’s first law states that an object remains at rest, or continues moving with constant velocity, unless acted on by a non-zero resultant force. If a drifting rock experienced no resultant force, it would continue moving at the same speed in the same direction. It would not need a continuing push.
State both parts of Newton’s First Law: what happens to a stationary object and what happens to a moving object when the resultant force is zero.
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Physics, Combined Science
An object remains at rest or moves with constant velocity unless a non-zero resultant force acts on it.
Revise: Newton's Laws and Changes in MotionNewton’s first law states that an object remains at rest or continues moving with constant velocity unless a non-zero resultant force acts on it. Velocity means speed in a particular direction, so constant velocity means constant speed along a straight line.
