The class I'm taking is physics for scientists and engineers! I am completely stuck. Need help. I have attached the problem. Please view attachment before answering. If you can please explain your answer so I can fully understand. Thank you! A sled of mass 70 kg starts from rest and slidesdown a 10° incline 80 m long. It then travels for20 m horizontally before starting back up an 8°incline. It travels 80 m along this incline beforecoming to rest. What is the magnitude of the network done on the sled by friction?

Answered: Image /qna-images/answer/a4d0d9c2-e3a3-4f19-afae-c1c3f99c1c12.jpg

A sled of mass 70 kg starts from rest and slides down a 10° incline 80 m long. It then travels for 20 m horizontally before starting back up an 8° incline. It travels 80 m along this incline before coming to rest. What is the magnitude of the net work done on the sled by friction?

A sled of mass 70 kg starts from rest and slides down a 10° incline 80 m long. It then travels for 20 m horizontally before starting back up an 8° incline. It travels 80 m along this incline before coming to rest. What is the magnitude of the net work done on the sled by friction?

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The class I'm taking is physics for scientists and engineers!

I am completely stuck. Need help. I have attached the problem. Please view attachment before answering. If you can please explain your answer so I can fully understand. Thank you!