A stone (taken as a point mass) is thrown from a cliff of height H = 80m perpendicular to the ground. It falls L = 60m away from the cliff. What is the initial velocity V with which the stone is thrown?

Obviously we have to deduce the formula for velocity using kinematic equations w/ respect to H and L. Help will be very appreciated. Thank you.

14.87m/s

how?

Got It.

In the same problem, what is the time taken by the body to attain a velocity twice its initial velocity?

What is the displacement of the body at that time?