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## Homework Statement

A girl is on a ride at an amusement park. She is 30m above the ground and is ascending vertically at 5.0 m/s. While she is ascending, she holds her arm out and releases a penny. How long does it take th penny to reach the ground?

## Homework Equations

y=yi+vit+0.5(at^2)

Quadriatic formula.

## The Attempt at a Solution

vi=5.0 m/s

yi=30 m

a=-9.8 m/s^2 (Letting up be positive.)

y=0

0=30m+50m/s t+0.5(-9.8 ,/s^2) t^2

For the quadriatic formula, C= 30 m, B=50 m/s, and A= -4.9 m/s^2

After using the formula the positive answer is t≈10.79 s. Is this correct? Thanks for a reply!