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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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?
Transcribed Image Text: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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