Physics•Medium

Circular Motion

Physics challenge: A 0.5 kg ball on a 1.2 m string swings in a horizontal circle at 3 m/s.

Scenario

A ball on a string moves in uniform circular motion. You need to find the centripetal acceleration, force, and the period of revolution.

Question 1

What is the centripetal acceleration of the ball? (v = 3 m/s, r = 1.2 m)

m/s²

Question 2

What centripetal force must the string provide? (m = 0.5 kg)

Question 3

What is the period T of the circular motion?

Question 4

Which direction does centripetal acceleration point?

Tangent to the circle (forward)Outward from center (centrifugal)Inward toward centerUpward against gravity

Answer keys, scoring tolerance, XP, and awards stay on the server. Retrying the same attempt cannot award twice.