BRAINCAKEImpulse and Force-time Graphs
Newton's second law states that the resultant force on an object equals its rate of change of momentum, F = Δp/Δt. Rearranging gives FΔt = Δp. The product of the force and the time for which it acts is called the impulse.
Impulse is equal to the change in momentum. Its unit is the newton second (N s), which is equivalent to kg m s-1, the unit of momentum.
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Key terms in this lesson
- linear momentum
- The product of an object's mass and its velocity.
More in Momentum
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- Elastic and Inelastic Collisions
- Air Bags
- Conservation of Momentum as a Consequence of Newton's Laws
- Adding Momentum
- Resolving Momentum
- Conservation of Momentum in Two Dimensions
All 14 lessons in Momentum · All OCR AS-level Physics topics