- #1

Chica1975

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- 0

## Homework Statement

A potato gun contains a spring which is compressed a distance of 7.30cm (0.073m) when it is loaded. If the spring's constant is 41N/m, what is the launch speed of a .00321kg piece of potato when the gun is fired? Give the answer in m/s.

## Homework Equations

Power = W/T

V^2=Vi^@+2a(y-y0) (projectile motion)

I have no idea what else I need - am stuck.

## The Attempt at a Solution

I drew what it might look like and tried to work out mg (0.00321*9.8 = .31458) as the height but am really stuck.

the lecturer has given the answer as 8.3m/s

Help!