A body of mass m is projected at an angle $θ$ with the horizontal with an initial velocity $v_{0} .$ The average power of gravitational force over the whole time of flight is

m g cos θ

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\frac{1}{2} m g \sqrt{u cos θ}

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\frac{1}{2} m g u sin θ

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zero

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Solution

The correct option is D zero
The projected body again comes back down. Hence the net displacement in the vertical direction will be 0.
$∴ W = m g h = m g \times 0 = 0$

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A body of mass m is projected at an angle θ with the horizontal with an initial velocity v0. The average power of gravitational force over the whole time of flight is

The correct option is D zeroThe projected body again comes back down. Hence the net displacement in the vertical direction will be 0.∴W=mgh=mg×0=0

A body of mass m is projected at an angle $θ$ with the horizontal with an initial velocity $v_{0} .$ The average power of gravitational force over the whole time of flight is

The correct option is D zero
The projected body again comes back down. Hence the net displacement in the vertical direction will be 0.
$∴ W = m g h = m g \times 0 = 0$