Question

(v) A body thrown vertically upward reaches a height of 20 m.
Find its initial velocity and the time taken by the body to
come back to the earth. (g = 10 m/s2)​

Answer 1

Answer:

Let the initial velocity = u. final velocity = v. v= 0 m/s. s = 500 m. 2gs = v2−u2. 2 (-10) 500 = u2. u = 100 m/s. v = u + at. 0 = 100 - 10 t. t = 10 s. total time taken = 20 sec. verified_toppr. Answer verified by Toppr. Upvote (0).