Answer:

Step-by-step explanation:
Given
--- Initial velocity
Required
Determine the velocity at maximum altitude
When a ball or an object is thrown upward, it reaches a maximum height, then stops momentarily and then descends downwards
The sequence of the event is:
- Object thrown upward
- Stops at maximum altitude
- Descends downward
At the point where the object stops (i.e. the maximum altitude), the velocity is 0
Hence, the required velocity is:
