A rock is given a KE of 2.00*10^4 J when it is launched vertically upward.
If the rock reaches a height of 50m determine the mass of the rock.
(1/2) m v^2 start = m g h at top
so
m g h = 2 * 10^4
m = 2*10^4 / (9.81*50)
= 40.8 kg
If the rock reaches a height of 50m determine the mass of the rock.
so
m g h = 2 * 10^4
m = 2*10^4 / (9.81*50)
= 40.8 kg