Young David who slew Goliath experimented with slings before tackling the giant. He found that he could revolve a sling of length 0.450 m at the rate of 10.0 rev/s. If he increased the length to 0.750 m, he could revolve the sling only 8.00 times per second.

(a) What is the speed of the stone for each rate of rotation?

m/s at 10.0 rev/s

m/s at 8.00 rev/s

(b) What is the centripetal acceleration of the stone at 10.0 rev/s?

m/s2

(c) What is the centripetal acceleration at 8.00 rev/s?

m/s2