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## Homework Statement

A 3-kg mass starts at rest and slides a distance d down a smooth 30o incline, where it contacts an unstressed spring. It slides an additional 0.2m as it is brought momentarily to rest by compressing the spring (k=400 N/m).

Find the initial separation d between the mass and the spring.

## Homework Equations

Work=F*d

Ek=1/2mv^2

Espring=1/2kx^2

v2^2-v1^2=2ad

d=vt

Fg=mg

## The Attempt at a Solution

I know that vf=0

and that v1=0

I really need help with v2 but im not too sure how to go at it.

is this way of finding v correct even though the balls velocity is at an angle:

1/2mv^2=1/2kx^2

v= sqrt16/3 m/s

can anybody please help?