A boy swings a ball on a string at constant speed in a circle that has a circumference equal to 6 m. What is the work done on the ball by the 10 N tension force in the string during one revolution of the ball

0 J

Explanation:

From the diagram below; we would notice that the Force (F) = Tension (T)

Also the angle θ adjacent to the perpendicular line = 90 °

The Workdone W = F. d

W = Fd cos θ

W = Fd cos 90°

W = Fd (0)

W = 0 J

Hence the force is perpendicular to the direction of displacement and the net work done in a circular motion in one complete revolution is = 0

coil wire, increase current, put iron inside the coil

if they have a finite resultant