A 4.00 kg mass is moving in a circular path of radius 2.50 m with a constant angular speed of 5.00 rad/sec. The magnitude of the radial force on the mass is
A) 250 N.
B) 185 N.
C) 153 N.
D) 107 N.
E) 94.0 N.

Question

Quizplus · Accepted Answer

The radial force on the mass is given by F = mv^2/r, where m is the mass, v is the speed, and r is the radius of the circular path. Substituting the given values, we get F = (4.00 kg)(5.00 rad/sec)^2/(2.50 m) = 250 N.

A 400 Kg Mass Is Moving in a Circular Path of of Radius