3. A ball is hit upward with a speed of 7.5 m/s. How long does the ball take to reach maximum height?

t = 0.75 seconds

Explanation:

Given that,

The initial speed of a ball, u = 7.5 m/s

We need to find the time taken by the ball to reach the maximum height. Let t is the time taken.

At maximum height, its final speed, v = 0 and it will move under the action of gravity.

Using the equation of motion to find t.

Use a = -g

Hence, the ball will take 0.75 seconds to reach the maximum height.

he kicked it 10 feet straight up into the air? i think this works.

50 inches should be the resultant vector