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Unit 5: Impacts and linear momentum. Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501 (c) (3) nonprofit organization. Donate or volunteer today! About. News. Impact. Our team. Our interns.
Learn about linear momentum and impulse in high school physics on Khan Academy.
For deeper explanations of impulse, see our video about momentum and impulse. To check your understanding and work toward mastering these concepts, check out our exercise on calculating change in momentum and speed from force vs. time graphs .
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So if you don't have any impulse, especially if you don't have any net force acting on an object, its momentum is going to be constant. You have a conservation of momentum. And we use that idea in all sorts of interesting physics applications in the world, and especially a lot of cases using billiard balls and whatever else.
Impulse is a term that quantifies the overall effect of a force acting over time. It is conventionally given the symbol J and expressed in Newton-seconds. For a constant force, J = F ⋅ Δ t .
Check your understanding of impulse in this set of free practice questions. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.
Aprenda o que é momento e o que é impulso, e como eles estão relacionados à força.