Share
Explore BrainMass

Angular Momentum and Centripetal Force

A car of mass 1000kg moves with a speed of 50 m/s on a circular track of radius 100m. What is the magnitude of its angular momentum (in kg.m^2/s) relative to the center of the racetrack?
==============================================
Answers:
a) 5 x 10^2
b) 5 x 10^6
c) 2.5 x 10^6
d) 2.5 x 10^4
#################################################
A 50 kg ice skater is moving at 5 m/s when she grabs the loose end of a rope, then opposite end of which is tied to a pole. She then moves in a circle of radius 1m around the pole. Determine the force exerted by the rope on her arms.
==============================================
a) 1250 N
b) 250 N
c) 50 N
d) 1100 N
================================================

Solution Preview

Hello and thank you for posting your question to Brainmass.

Angular momentum is defined as
J=P*r*sin(w)

Where P is the linear momentum vector's magnitude of the object and r is the distance vector's magnitude from the object to the ref. point. w is the angle between the two vectors.

in our case ...

Solution Summary

The solution provides calculations for angular momentum and centripetal force. Step by step problem solving and equations are provided.

$2.19