Question

a ball is dropped from a tall bridge of height 81 m. What will the speed of the ball be immediately before it hits the ground, in units of m/s?

Answer 1

Answer:

approximately 40

Explanation:

x=ut+1/2at^²

81=0+5t^²

t=√81/5

t=4(approximately)

v=u+ at

v=0+10(4)

v= 40