You whirl a 2-kg body attached to a 1-meter cord around your head in a nearly horizontal circle with a speed of 4 m/s.The tension in the cord is
A)2 N.
B)4 N.
C)8 N.
D)16 N.
E)32 N.

Question

Quizplus · Accepted Answer

The tension in the cord is the centripetal force required to keep the body moving in a circle. The formula for centripetal force is F = mv²/r. Substituting the given values: F = (2 kg)(4 m/s)²/(1 m) = 32 N.

You Whirl a 2-Kg Body Attached to a 1-Meter Cord