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**[SOLVED] Spring launcher**

## Homework Statement

A spring is launched to hit a target. The target is at a certain distance and height. How do you find the velocity needed to hit the target? The height and distance of the target, and the angle of the launcher are given.

## Homework Equations

F=kx

x=[tex]\sqrt{m(v^2)/k}[/tex]

v=[tex]\sqrt{gx\Delta/(sin2\theta)}[/tex]

## The Attempt at a Solution

Completely lost for ideas.