The velocity of a ball dropped from a height of 20 m when it hits the ground can be calculated using the formula for the final velocity of an object in free fall.
Here's how you can calculate it:
1. Start by determining the final velocity (Vf) using the formula:
Vf = sqrt(2 * g * h)
where:
- Vf is the final velocity
- g is the acceleration due to gravity (9.8 m/s²)
- h is the height (20 m in this case)
2. Substitute the values into the formula:
Vf = sqrt(2 * 9.8 * 20)
Vf = sqrt(392)
Vf ≈ 19.799 m/s
Therefore, the velocity of the ball dropped from a height of 20 m when it hits the ground is approximately 19.799 m/s.
