(1 point) Basil drops a baseball from the top of a 88 m tall building. (a) Determine the speed of the ball 2's after it was dropped.
m/s
(b) Determine how far the ball falls after 2 s.
m
(c) Determine when the ball reaches the ground.
I
s

a) The magnitude of the speed of the ball at 2s is 19.62 m/s.

b) The ball has traveled 19.62 m after 2 seconds

c) The ball reaches the ground in 4.24 s.

Explanation:

a) The speed of the ball at 2 s after it was dropped is:

Where:

: is the final speed =?

: is the initial speed = 0 (it is dropped)

g: is the gravity = 9.81 m/s²

t: is the time = 2 s

Then, the speed of the ball at 2s is -19.62 m/s. The minus sign is because the speed is in the negative direction (down).

b) The height at which is the ball after 2 seconds is:

Taking y₀ = 0 we have:

The ball has traveled 19.62 m after 2 seconds. The minus sign is because the height is in the negative direction.

c) The time at which the ball reaches the ground is:

Therefore, the ball reaches the ground in 4.24 s.

I hope it helps you!                      

e/c, where e is its total energy