Impulse - Momentum Review Sheet Momentum • How do you calculate momentum? • What two factors affect the momentum of an object? • As the speed of an object increases what happens to the momentum? • If you double the speed of an object what happens to momentum? • What are the units of momentum? • Which of the following has the largest momentum: a 50-kg student running at 3 m/s, a 300-kg car that is at rest, or a 2 kg dog that is running at 1 m/s? Impulse • Impulse is equal to the change in an object’s __________. • What are the units for impulse? • Are the units for impulse equivalent to the units for momentum? Impulse – Momentum • Airbags reduce injury by increasing what variable? • Explain the strategy in catching a water balloon during the balloon toss experiment. • What can a baseball player do to increase the momentum of his swing? • The impulse necessary to change an object’s momentum by 5 kg m/s is? Collisions • List one example of an elastic collision. • What is the difference between an elastic and inelastic collision? • When two objects hit each other an _____ occurs. • What is the law of conservation of momentum? • What affect does bouncing have on a collision? • Explain the physics behind air bags, seat belts and padded dashboards.

Word Problems • Calculate the impulse necessary to change the momentum of a 100 kg object by 20 kg m/s. • Calculate the momentum of a 400-kg car traveling at 10 m/s.

Word Problems • Calculate the impulse necessary to change the momentum of a 100 kg object by 20 kg m/s. • Calculate the momentum of a 400-kg car traveling at 10 m/s.