Question

How fast is a ball going when it hits the ground after being dropped from a

height of 9 m? The acceleration of gravity is 9.8 m/s2
O A. 17.6 m/s
O B. 14.9 m/s
O C. 11.5 m/s
O D. 13.3 m/s


Help !

Answer 1

Option D.

Step-by-step explanation:

Data:

• Height (h) = 9 m
• Gravity (g) = 9.8 m/s²
• Velocity Final (Vf) = ?

Use formula:

• Vf² = 2 * g * h

Replace:

• Vf² = 2 * 9.8 m/s² * 9 m

Multiply gravity with height:

• Vf² = 2 * 88.2

Multiply:

• Vf² = 176.4

Solve the square root:

• Vf = 13.3

How fast is the ball going?

The speed is going at a speed of 13.3 meters per second.