Homework Help: physics

Posted by Edith on Wednesday, January 11, 2012 at 9:10pm.

Calculate the period of a ball tied to a string
of length 1.7 m making 3.6 revolutions every
second.
Answer in units of s

Calculate the speed of the ball.
Answer in units of m/

physics - Steve, Thursday, January 12, 2012 at 10:28am
period = 1/frequency = 1/3.6 = 0.2777 s

circumference = 2pi*r = 10.7m
speed = distance/time (or, distance * frequency) = 10.7*3.6 = 38.5m/s

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