Question Number 194602 by byaw last updated on 10/Jul/23
$$ \\ $$A ball is thrown vertically upwards with a velocity of 10m/s from a point 75 m above the ground. Calculate the velocity with which it hits the ground.
Answered by mr W last updated on 14/Jul/23
$${v}_{\mathrm{2}} ^{\mathrm{2}} ={v}_{\mathrm{1}} ^{\mathrm{2}} +\mathrm{2}{gh}=\mathrm{10}^{\mathrm{2}} +\mathrm{2}×\mathrm{10}×\mathrm{75}=\mathrm{1600} \\ $$$$\Rightarrow{v}_{\mathrm{2}} =\mathrm{40}\:{m}/{s} \\ $$