A particle is projected vertically upwards with a speed of 16 m s - 1 . After some time, when it again passes through the point of projection, its speed is found to be 8 m s - 1 . It is found that the work done by air resistance is the same during the upward and downward motions. Then the maximum height attained by the particle is

Question

A particle is projected vertically upwards with a speed of 16 m s - 1 . After some time, when it again passes through the point of projection, its speed is found to be 8 m s - 1 . It is found that the work done by air resistance is the same during the upward and downward motions. Then the maximum height attained by the particle is, 8 m, 4.8 m, 17.6 m, 12.8 m

MARKS App · Accepted Answer

From work energy theorem for upward motion, 1 2 m 16 2 = m g h + W For downward motion, 1 2 m 8 2 = m g h – W h = 8 m

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