Question sammy 75kg skiis down a 20 degree slope starting, Ask an Expert

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Question: Sammy (75kg) skiis down a 20 degree slope starting from rest. A strong headwind blowing horizontally exerts a constant 30N force on him as he skiis. If the length of the slope is 400m,

Part A: How long does it take him to reach the bottom?

I need tutor help to solve the above question and ignore any effects of friction between Sammy's skiis and the snow.

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