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## Homework Statement

A spring with a spring- constant 3.4N/ cm is compressed 29cm and released. The 2 kg mass skids down the frictional incline of height 50 cm and inclined at 21 degrees angle.

The acceleration of gravity is 9.8 m/s^2.

The path is frictionless except for a distance of .07 m along the incline which has a coefficient of friction of 0.5.

## Homework Equations

I am kind of completely lost.

## The Attempt at a Solution

so far this is what I have but its probably wrong anyway

50cos(21)= 46.67902132486

50sin(21)= 17.9183974

N=mg

N= (2)(9.8)= 19.6

Friction= NmK

Friction= (19.6)(0.5)= 9.8

PE= 14.297m

KE= 9.8

Total Energy= 24.097

Problem attached its #6..

Thanks