Saturday
April 19, 2014

Homework Help: physics

Posted by Stehlin on Tuesday, February 19, 2013 at 9:15am.

Consider the system shown, with m1 = 2.0 kg,
m2 = 3.0 kg, and = 30o. The force F acts
horizontally to the left and the kinetic coefficient of
friction between m1 and the incline is k = 0.40. The
mass m2 is moving up at a constant speed.
(a) What is the magnitude of F?
(b) If the mass m2 moves up a distance of 2.0 m,
what is the work done by the following forces
acting on m1: (i) the force F, (ii) the normal force
due to the incline, (iii) the tension, (iv) friction, and
(v) gravity? What is the net work done on m1 by all the forces?
(c) If the mass m2 moves up a distance of 2.0 m, what is the work done by the following forces
acting on m2: (i) the tension and (ii) gravity? What is the net work done on m2 by all the forces?

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