Question

A body projected vertically upward with a velocity u returns to the starting point in 4 seconds if g =10m/s2 the value of u is

​

Answer 1

Answer:

20m/sec

Explanation:

initial velocity= final velocity in full vertical journey, is it stops at the same point where from it starts.

So, v=u

-v=u-at

2u=10×4

u=20m/sec