A 40 Kg Mass Is Moving in a Circular Path of of Radius

Multiple Choice

A 4.0 kg mass is moving in a circular path of radius 2.5 m with a constant linear speed of 5.0 m/s. The magnitude of the radial force on the mass is

A) 20 N.
B) 25 N.
C) 35 N.
D) 40 N.
E) 45 N.