Find Sam's speed at the bottom using work and energy

[mookie84]

Need help please!

Homework Statement

Sam, whose mass is 75 kg, straps on his skis and starts down a 50-m-high, 20 degrees
frictionless slope. A strong headwind exerts a horizontal force of 200 N on him as he skies.

Find Sam's speed at the bottom using work and energy.
Find Sam's speed at the bottom using Newton's laws.

Homework Equations

The Attempt at a Solution

 

[mgb_phys]

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