After this lesson, you should be able to:

- Explain why impulse is associated with collisions
- Define impulse as the product of net force and contact time (duration of collision)
- Understand that Newton’s second law can be also expressed in terms of impulse, the impulse-momentum theorem
- Represent impulse as a vector
- Use the impulse-momentum theorem in problem solving to determine the

- average force involved in a collision
- time of collision
- change in momentum

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15 lessons in Physics