Question

In 25s , a 0.81 hp crane lifted bags of cement with a total mass of 600 N to the top of a building that is being constructed . how tall is the building ?

Answer 1

$t=25s, u=0m/s$

let height, $h= ut +1/2gt^{2}$ =$0 + 1/2(-9.8)(25)^{2}= -3062.5m$

the building is 3062.5m tall.