A point on a wheel rotating at 5.00 rev/s is located 0.200 m from the axis. What is the centripetal acceleration?
198 m/s².
1.35 m/s².
48.0 m/s².
0.050 m/s².
A stone, of mass m, is attached to a strong string and whirled in a vertical circle of radius r. At the exact bottom of the path the tension in the string is 3 times the stone's weight. The stone's speed at this point is given by
(gr)1/2.
2gr.
2(gr)1/2.
(2gr)1/2.
