A 500-g ball moves in a circle 40 cm in radius at a speed of 4 m/s. The centripetal force on the ball is
A) 10 N.
B) 20 N.
C) 40 N.
D) 80 N.

Question

Quizplus · Accepted Answer

The centripetal force can be calculated using the formula $ F = \frac{mv^2}{r} $, where $ m = 0.5 $ kg (mass of the ball), $ v = 4 $ m/s (speed of the ball), and $ r = 0.4 $ m (radius of the circle). Plugging these values into the formula gives $ F = \frac{0.5 \times 4^2}{0.4} = 20 $ N.

A 500-G Ball Moves in a Circle 40 Cm in Radius