Question

body is thrown vertically upwards and rises to a maximum height of 10m. The velocity with which the body was thrown upwards is (Take g = 9.8m/s2) 1) 10m/s 2) 14m/s 3) 20m/s 4) none of above
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Answer 1

Answer:

Correct option is 2) 14 m/s

Explanation:

Maximum height h=10 m/s

At maximum height, v=0

Let the initial velocity be u.

Acceleration a = −g = −9.8 m/s ²

∴ 0 − u² =2(−9.8)(h)

⟹ u= √[2gh]

= √[2×9.8×10]

=14 m/s