Question

I swing a ball around my head at constant speed in a circle with circumference 3 m. What is the work done on the ball by the 10 N tension force in the string during one revolution of the ball

Answer 1

Answer:

The work done on the ball by the tension force is 0 J.

Explanation:

The work can be calculated as follows:

$W = |F|\cdot |d|cos(\theta)$

Where:

F: is the tension force = 10 N

d: is the displacement = ball's circumference = 3 m

θ: is the angle between the force and the distance = 90°

Hence, the work is:

$W = |10| \cdot |3| cos(90) = 0 J$

Since the tension force and the displacement vector are orthogonal, the work done on the ball is zero.

                             

Therefore, the work done on the ball by the tension force is 0 J.

I hope it helps you!