A-LevelPhysicsDynamics9702/12 · Feb/Mar 2016 · Q91 Mark
Which statement defines force?
AWhen a force acts on a body that is free to move, the force is the product of the mass of the body and its acceleration.
BWhen a force acts on a body that is free to move, the force is the rate of change of momentum of the body.
CWhen a force acts on a body that is free to move, the force is the work done by the force divided by the distance moved by the body.
DWhen a force acts on a lever and causes a moment, the force is the moment divided by the perpendicular distance of the force from the pivot.
✓ Correct answer
B: When a force acts on a body that is free to move, the force is the rate of change of momentum of the body.
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