Homework Help: Physics

Posted by ash on Thursday, January 20, 2011 at 6:50pm.

Someone attaches a 27 kg bale of hay to one end of a rope passing over a frictionless pulley connected to a beam in a hay barn. Someone else pull down on the opposite en of the rope with a force of 397 N. Ignoring the mass of the rope, what will be the magnitude and directionf the bales acceleration if the gravitational force is 265 N?

Physics - drwls, Thursday, January 20, 2011 at 6:57pm
Just use F = M*a, where:
M = bale mass = 27 kg,
F = net force = T - Weight
T = pulling force, which will be the tension on either side of the pulley.

Weight = M g = 265 N

a = F/M = (397-265)/27 = 4.9 m/s^2
Physics - ash, Thursday, January 20, 2011 at 6:59pm
Ok, thats what I got but I wasnt sure if it was correct. Thanks so much!

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