Question

A drop hammer is lifted to a height of 50m above the ground and then allowed to fall from rest on to forging at ground level. Calculate the downward velocity of the hammer when it strikes the forging (g=10m/s)?

Answer 1

how long does it take to fall 50m? 4.9t^2 = 50
v = -9.8t

Answer 2

V^2 = Vo^2 + 2g*h = 0 + 20*60 = 1200,
V = __m/s.