Question

a ball is thrown downward with an initial speed of 7m/s. the balls velocity after 3 seconds is m/s

Answer 1

Answer:

velocity = distance / time

distance = speed * time

Distance= 7*3 = 21

V = 21/3

V = 7

Explanation:

Answer 2

Answer: -36.4

Explanation:

It says that the initial speed is 7 and the time is 3. acceleration is -9.8 ( its always 9.8 but since its going downward its negative)

The equation you want to use is Vf = Vo + AT.

When you plug in the answers it is

0 = 7 + -9.8(3)

-9.8(3) = -29.4

Then add 7

and you get -36.4