In a sling, a 0.50 kg rock is whirled horizontally in a circle with a diameter of 2.0 m. If the
speed of the rock is 12 m/s, what force does the rock exert on the string and the string on the
rock, respectively?
A. 72 N and 72 N
B. 36 N and 72 N
C. 36 N and 36 N
D. 72 N and 36 N
Clear my choice