A ball is thrown upward at 25 m/s from the ground. what is the balls velocity after 4 seconds?

-14.2m/s

Explanation:

Given parameters:

Initial velocity of the ball  = 25m/s

Time  = 4s

Unknown:

Final velocity of the ball  = ?

Solution:

To solve this problem, we use the expression below;

               v  = u - gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

t is the time

             v = 25  - (9.8 x 4)  = -14.2m/s

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

think its the third option