Jessica R.

asked • 10/22/17

physics question

Two blocks, A and B (with mass 45 kg and 125 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is
μk = 0.22.
Determine the change in the kinetic energy of block A as it moves from circled C to circled D, a distance of 23 m up the incline (and block B drops downward a distance of 23 m) if the system starts from rest.

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