Purchase Solution

Conservation of momentum

Not what you're looking for?

Ask Custom Question

A hockey stick of mass m_s and length L is at rest on the ice (which is assumed to be frictionless). A puck with mass m_p hits the stick a distance D from the middle of the stick. Before the collision, the puck was moving with speed v° in a direction perpendicular to the stick. The collision is completely inelastic, and the puck remains attached to the stick after the collision.

a)Find the speed v_f of the center of mass of the stick+puck combination after the collision

b)After the collision, the stick and puck will rotate about their combined center of mass. How far is this center of mass from the point at which the puck struck? In the figure, this distance is (D-b)

c)What is the angular momentum L_cm of the system before the collision, with respect to the center of mass of the final system?

d)What is the angular velocity w of the stick+puck combination after the collision? Assume that the stick is uniform and has a moment of inertia I_o about its center. Your answer for w should not contain the variable b.

e)Which of the following statements are TRUE?

1) Kinetic energy is conserved.
2) Linear momentum is conserved.
3) Angular momentum of the stick+puck is conserved about the center of mass of the combined system.
4) Angular momentum of the stick+puck is conserved about the (stationary) point where the collision occurs.

Purchase this Solution

Solution Summary

The solution contains 5 pages of derivations and diagrams that deals with conservation of angular momentum and motion about the center of mass.

Solution Preview

Hello and thank you for posting your question to Brainmass!
The solution is attached ...

Purchase this Solution


Free BrainMass Quizzes
Basic Physics

This quiz will test your knowledge about basic Physics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

The Moon

Test your knowledge of moon phases and movement.