hf=hi+vi*t-4.8t^2
0=20+0*t-4.8t^2
solve for t.
vf=vi+9.8t, using t from above, solve for vf
1.A ball is dropped from the height of 20m.calculate
(i) the time taken by the ball to reach the ground.
(ii) the velocity with which the ball strikes the ground.
1 answer