Question

At exactly 2 hr :00min a pendulum Bob is thrown vertically upward from the ground with an initial velocity of 75m/s,at what time will the Bob return to the ground

Answer 1

Answer

time will the Bob return to the ground is given

T=$\frac{2u}{g}=\frac{2\times75}{9.8}=15.37s$

So time is 2hr:15min:37sec.