Question

A particle is projected upward with speed, v. Speed (u) of body on reaching the point from which it was projected, is

Answer 1

Answer:

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Answer 2

Answer:

If h is the maximum height then h= 2gu 2

Time taken to reach height h, t= gu

Let v be the speed at

43h

then v 2

=u 2

−2g( 43h)⇒v= 2u

let be the time taken to reach

43h

then

2u

=u−gt ′

⇒t ′

= 2gu

= 2t