A 1-m long pendulum with a mass of 5 kg moves at a velocity of 3 m/s at the bottom of its swing.What it the tension in the string at this point?
A)45 N
B)94 N
C)49 N
D)73 N
E)67 N

Question

Quizplus · Accepted Answer

The tension in the string is the sum of the gravitational force and the centripetal force. The gravitational force is mg = 5 kg * 9.8 m/s² = 49 N. The centripetal force is mv²/r = 5 kg * (3 m/s)² / 1 m = 45 N. Therefore, the total tension is 49 N + 45 N = 94 N.

A 1-M Long Pendulum with a Mass of 5 Kg