SAT Subject Physics Practice Question 492: Answer and Explanation
8. A .5 kg ball is swinging at the end of a 2 m string that has a tension of 6.25 N in it. Find the speed of the ball as it travels its circular path.
Correct Answer: C
The correct answer is (C). The velocity of the ball in its pathway is calculated with the centripetal force equation, , which is rearranged to