Two blocks (with masses 10.1 kg and 65 kg) are connected by a string. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between the block and machine is 0.299. The acceleration of gravity is 9.8 m/s^2.(adsbygoogle = window.adsbygoogle || []).push({});

Find the change in the kinetic energy of the block on the incline (block on the incline is the 10.1 kg one; the 65 kg is hanging down and pulling the 10.1 kg mass up the incline) as it moves a distance of 16.4m up the incline (which is 38.3 degrees) if the system starts from rest. Answer in units of kJ.

Ok guys, I tried doing this problem for 2 hours now and got 5/6 attempts wrong online when I input my previous answers. So I basically have one more try left at this one. What I did b4 was find the net force on the entire system and multiply it by the distance, 16.4, and I got 9059.8 J. Now since Kf - Ki = W and Ki = 0, wouldn't Kf just be equal to the work? Apparantly not, so I then tried to subtract the work done by the 65 kg block since they are asking for the change in kinetic energy of the 10.1 kg block, but that didn't work either. I'm up for any suggestions because my friend from college has not called me back yet. Thanks guys ...

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# Homework Help: Kinetic Energy

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