Physics Circular Motion

Question

Young David, who slew Goliath, experimented with slings before tackling the giant. He found that with a sling of length 0.551 m, he could revolve the sling at the rate of 6.44 rev/s. If he increased the length to 0.777 m, he could revolve the sling only 4.04 rev/s.

a) What is the larger of the two linear speeds? Answer in units of m/s.

b) Using the sling length 0.777 m, what is the centripetal acceleration at 4.04 rev/s? Answer in units of m/s 2 .

Answer 1