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Jason takes off from rest down a 50 m tall, 10.0° degree slope on his jet-powered...

Jason takes off from rest down a 50 m tall, 10.0° degree slope on his jet-powered skis. The skis have a thrust force of 280 N, directed so that the force pushes Jason forward along the slope. The combined mass of skis and Jason is 50.0 kg. Jason’s speed at the bottom of the hill is 40.0 m/s. What is the magnitude of the frictional force that must be acting on the skis?

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