A block starts from rest at the top of a frictionless ramp that is high

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

4.0\,\text{kg}

block starts from rest at the top of a frictionless ramp that is

3.0\,\text{m}

high. It reaches the bottom after

1.5\,\text{s}

. What is the average power supplied by gravity during the descent? (a)

3.0\times10^{2}\,\text{W}

(b)

7.8\times10^{1}\,\text{W}

(c)

1.2\times10^{2}\,\text{W}

(d)

3.9\times10^{1}\,\text{W}