5. A sling having a total length of 1.40 m is used to launch a 90 g rock.
a. If the rock makes exactly 7 revolutions in 1.0 s, what is the period of the rock's
revolution? Show your work.
b. If the rock makes exactly 7 revolutions in 1.0 s, with what speed will the rock leave
its circular motion? Show your work.
