David whirls a rock that is held in his sling at 3.4 rotations per second. The radius of the rocks circular motion is 1.6m. What will be the velocity of the rock when it strikes Goliath?

Answer 1

1 rotation = 2∏(1.6m); v = 3.4(2∏)(1.6m)/1s = 34.2m/s