Average Power of Gravitational Force
A 0.5 kg block starts from rest and slides down a frictionless incline. After descending a vertical distance of 2.0 m, the block’s speed is 6.0 m/s. What is the average power exerted by the gravitational force on the block during this descent?
A
P = mgh/(v/g)
B
P = (mgh)/t where t = 2h/(v₀+v)
C
P = (½mv²)/t where t = h/v
D
P = mg(v₀+v)/2
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