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## Homework Statement

A ball is thrown off of a building in the +x direction at 10m/s. If the ball takes 2s to land, how tall is the building?

## Homework Equations

- Vf=Vi(a)(t)
- Δd=Vi(t)+1/2(a)(t)
- Vf^2=Vi^2+2(a)(Δd)
- Δd=1/2(Vf-Vi)(t)

## The Attempt at a Solution

- Vf: 0m/s
- Vi: 10m/s
- a: -9.8m/s^2
- t: 2s
- Δd: ?

the choices are

A. 19.6m

B. 5.1m

C.33.3m

D. 2m

E. 1m

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