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A body is projected vertically upward with an initial velocity u. Find the time taken to reach maximum height.

1. u/g
2. 2u/g
3. u/2g
4. u/4g

Correct answer: u/g

Solution

At maximum height, the final velocity becomes zero. Using the first equation of motion, v = u - gt, and setting v = 0, we get t = u/g.

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