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Question

Question: A body is thrown horizontally from the top of a tower of height 5 m. It touches the ground at a dist...

A body is thrown horizontally from the top of a tower of height 5 m. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is (g = 10 ms–2)

A

2.5 ms–1

B

5 ms–1

C

10 ms–1

D

20 ms–1

Answer

10 ms–1

Explanation

Solution

S=u×2hgS = u \times \sqrt{\frac{2h}{g}}10=u2×51010 = u\sqrt{2 \times \frac{5}{10}}u=10m/su = 10m/s