Question

A circus artist drops a ball from a high wire. The ball takes 1.5 seconds to reach the ground.

I) Find the height of the ball above the ground.

II) How fast is the ball moving as it hits the ground?

Write an expression for the speed of the ball t seconds after it's dropped where o<t<1.5

the expressions are tricky to work out. Please help.

Answer 1

1. h = 0.5g*t^2 = 4.9*1.5^2 =

2. V^2 = Vo^2 + 2g*h.
Vo = 0, g = 9.8 m/s^2, V = ?.

Answer 2

V = Vo + g*t.
Vo = 0, g = 9.8 m/s^2, t is greater 0, but less than 1.5 s.