a body of mass m is projected from ground with speed u at an angle theta with horizontal the - Physics - Work Energy and Power

Question

a body of mass m is projected from ground with speed u at an angle
theta with horizontal the power delivered by gravity to it at half
of maximum height from ground is

Shobhit Mittal · Accepted Answer

Dear Student,

the force acting on the particle is downward by the gravity and the body is moving upward hence the workdone by the gravity is -ve 
total WD=-mgHmax=-mu2sin2θ2time taken to reach maximum height t=usinθgpower=-mu2sin2θ2usinθg=-musinθ2gREgards

a body of mass m is projected from ground with speed u at an angle theta with horizontal. the power delivered by gravity to it at half of maximum height from ground is