Question

a ball thrown vertically upward reaches ground 4sec determine the total distance converd by ball assuming g=10m/sq sec​

Answer 1

Explanation:

it takes 4 sec to reach the ground

so it will take 2 sec to reach Max height..

v = u+at

(at Max height velocity is 0)

0 = u + (-10) (2)

u = 20 m/s

S = ut+1/2 at^2

= 20 (4) +1/2 (+10)(16)

= 80 + 80

= 160m

Also displacement is 0 as the ball return in its initial position..