Question

Your roommate drops your wallet down to you from the third floor window of your apartment, which is 11.5m from the ground. what is the velocity of the wallet when you catch it. ( Assume you catch the wallet right before it hits the ground)

Answer 1

15.0 m/s

Step-by-step explanation:

Take the down direction to be positive.

Given:

Δy = 11.5 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (9.8 m/s²) (11.5 m)

v = 15.0 m/s