A m1 = 45.0 kg block and a m2 = 105.0 kg block are connected by a string as in Figure P7.44. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between the 45.0 kg block and incline is 0.250. Determine the change in the kinetic energy of the 45.0 kg block as it moves from A to B, a distance of 20.0 m.(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\Delta[/tex]KE = Wnet

[tex]\Delta[/tex]KE = Wg - Wfk

[tex]\Delta[/tex]KE = mgh - (uk)(N)(x)

[tex]\Delta[/tex]KE = mgh - (uk)(mgcos[tex]\theta[/tex])(x)

Final answer is incorrect. Any ideas? Thanks in advance.

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# Homework Help: Energy and WET (Incline pulley system)

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