Question

A stone is thrown vertically upwards by a boy IT returns to his hands in 3 seconds how height does the sun rise

Answer 1

Answer:

Initial velocity of the stone, u = ?

final velocity of the stone , v = 0

acceleration due to gravity, g = 9.8

time , t = 3 sec

using relation,

$v = u + gt$

$0 = u - 9.8 \times 3$

$u = 29.4 \frac{m}{s}$