Question

A stone is thrown vertically upwards takes three seconds to attend its maximum height initial velocity of the stone is ?

Answer 1

Answer:

30

Explanation:

v=u+at

0=u-10×3

u=30

Answer 2

Answer:

v = 0

u = ?

a = -g

t = 3

v = u+at

0 = u-gt

u = gt

u = 9.8x3 = 29.4