# Momentum and Angular Momentum

Consider a small frictionless puck perched at the top of a fixed sphere of radius R. If the puck is given a tiny nudge so that is begins to slide down, through what vertical hight will it descend before it leaves the surface of the sphere?[Hint: Use conservation of energy to find the puck's speed as a function of its height, then use Newton's second law to find the normal force of the sphere on the puck. At what value of this normal force does the puck leave the sphere?]

© BrainMass Inc. brainmass.com October 24, 2018, 10:12 pm ad1c9bdddfhttps://brainmass.com/physics/conservation-of-energy/momentum-and-angular-momentum-151529

#### Solution Preview

Hello and thank you for posting your question to Brainmass.

The solution is attached below in two files identical in content but differ in format (MS-word and pdf) so you can choose the more suitable ...

#### Solution Summary

Consider a small frictionless puck perched at the top of a fixed sphere of radius R. If the puck is given a tiny nudge so that is begins to slide down, through what vertical hight will it descend before it leaves the surface of the sphere?[Hint: Use conservation of energy to find the puck's speed as a function of its height, then use Newton's second law to find the normal force of the sphere on the puck. At what value of this normal force does the puck leave the sphere?]

Angular momentum and stationary distance after a collision

A thin uniform rod of length .6m and mass M is rotating horizontally at 79.0 rad/s counterclockwise about an axis through its center. A particle of mass M/3 and speed 38.5 m/s hits the rod and sticks. The particle's path is perpendicular to the rod at the instant of the hit, at a distance d from the rod's center.

At what value of d are the rod and the particle stationary after the hit?

View Full Posting Details