Question

If you were to throw a ball vertically upward with an initial velocity of 50 m/s, approximately how long would it take for the ball to return to your hand? Assume air resistance is negligible.(a) 2.5 s (b) 5.0 s(c) 7.5 s (d) 10 s

Answer 1

d) 10 sec

here initial velocity u is 50 m/S
and when the ball is thrown upwards
the acceleration is -g
by v-u=at
-50 = -gt
:- t = 5 sec
this time is when the ball goes
to its maximum height
now the time to come ball from maximum height towards us is 5 sec as the height is same
so total time is 10 sec
is this helpful