Question

A ball is projected vertically upward from the ground it takes 4 seconds to reach a point P still moving upward.if takes 10 second for the to reach to ground then height of point P is

Answer 1

Answer:

78.4 m

Explanation:

using v=u+at

v=0 a=-9.8

we get

u=39.2

now using v^2=,u^2+2as

from here 0=39.2×39.2+2×{-9.8}s

s=78.4m