Question

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

Answer 1

t = 0.75 seconds

Step-by-step 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.

`v=u+at`

Use a = -g

`v=u-gt\\\\t=(u)/(g)\\\\t=(7.5)/(10)\\\\t=0.75\ s`

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