Momentum

Impulse and Momentum

Momentum Principles

Articles
Title
A 70.0-kg stuntman free-falls from a building for 2.5 s and hits an airbag. The airbag exerts a force on him over a time period of 2.0 s, and he comes to a complete stop. What was the approximate magnitude of the average force exerted by the airbag?
A 140-kg fullback is running with the football at 10 m/s. A 70-kg defender runs at him in the opposite direction at 5 m/s. The defender wraps his arms around the fullback. What is the velocity of the two players after the collision?
A barbell consists of a uniform rod with a mass attached to each end. The rod is 2.2 m long and has a moment of inertia about its center of mass of 1.5 kg.m^2. The center of each 3.0-kg mass is attached to the end of the rod. Calculate the rotational mome
A 260-g cue ball moving at 1.0 m/s strikes a 150-g numbered ball at rest. The collision is elastic and the cue ball stops. What is the speed of the numbered ball?
At a carnival, one of the booths has a shooting gallery with spring-loaded guns that fire 12-g suction-cup darts with a muzzle velocity of2.5 m/s. The 95-g targets are 25 cm tall and hinged at the bottom and may bemodeled as a plank pinned at one end (I=1
A cue ball with a mass of 250 g travels at 1.0 m/s and hits a numbered ball with a mass of 170 g at rest. The numbered ball moves off at an angle of 45°, while the cue ball moves off at an angle of -45°. At what speeds do the balls move?
A 1.0 Kg object, A, with a velocity of 4.0m/s to the right, strikes a second object, B, of mass 3.0Kg, originally at rest. In the collision, A is deflected from its original direction through an angle of 50 degrees; its speed after the collision is 2.0m/s
A person applies an impulse of 5.0 kg∙m/s to a box in order to set it in motion. If the person is in contact with the box for 0.25 s, what is the average force exerted by the person on the box?
All four forces are exerted on the stick that is initially at rest. What is the angular momentum of the stick after 2 s
A dog of mass 10 kg sits on a skateboard of mass 2 kg that is initially traveling south at 2 m/s. The dog jumps off with a velocity of 1 m/s north rela-tive to the ground. Which of the following is the best estimate of the velocity of the skateboard immed

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