Question

a body is thrown vertically up from the ground with an initial velocity of u find the greatest height reached and the time taken to reach back to ground
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Answer 1

Explanation:

The body that is thrown vertically upward with velocity u will have final velocity v=0 at the greatest height h.

Substituting the given values in the third equation of motion, v

2

=u

2

+2as

we have 0=u

2

−2gh. (taking g in the upward direction)

or h=

2gu2

.