A ball is thrown vertically upwards with a velcotiy of `20 ms^(-1)` from the top of a multi-storey building. The height of the point fromwher the ball is thrown if 25-0m from the ground. (a) How high the ball will rise ? And (b) how long will it be before the ball hits the ground ? Take. `g=10 ms^(-2)`.

Explanation

To solve the problem step by step, we will break it down into two parts: (a) finding how high the ball will rise, and (b) calculating how long it will take for the ball to hit the ground.

### Given Data:
- Initial velocity of the ball, \( u = 20 \, \text{m/s} \)
- Height of the building, \( h_b = 25 \, \text{m} \)
- Acceleration due to gravity, \( g = 10 \, \text{m/s}^2 \)

### (a) How high will the ball rise?
...