Forces and Pulleys of two blocks

AI Thread Summary
The discussion revolves around a physics problem involving two blocks connected by a rope over pulleys, with weights of 412N and 908N. The key questions focus on calculating the acceleration of the lighter block and understanding the difference in acceleration when the heavier block is removed and a downward force is applied. Participants suggest drawing force diagrams to clarify the forces acting on each block. To solve the problem, it's recommended to apply Newton's second law (F = ma) for both blocks and eliminate tension from the equations. The conversation emphasizes the importance of visualizing forces to tackle such problems effectively.
Cheddar
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Homework Statement


Two blocks are connected by a rope that passes over a set of pulleys. One block has a weight of 412N and the other has a weight of 908N. The rope and the pulleys are massless and there is no friction. (a) What is the acceleration of the lighter block? (b) Suppose that the heavier block is removed, and a downward force of 908N is provided by someone pulling on the rope. Find the acceleration of the remaining block. (c) Why are the answers in (a) and (b) different?

Homework Equations


weight = mass * acceleration(gravity)


The Attempt at a Solution


So mass = 42.0 kg for the smaller black and mass = 92.7 kg for the larger block.
This is as far as I get.
 
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If I were you, I would draw a force diagrams for each block. These kinds of problems can get really confusing if you don't sort out what forces are going where.
 
Cheddar said:
Two blocks are connected by a rope that passes over a set of pulleys. One block has a weight of 412N and the other has a weight of 908N. The rope and the pulleys are massless and there is no friction. (a) What is the acceleration of the lighter block?

Hi Cheddar! :smile:

Call the tension T, do two F = ma equations, one for each block, and then eliminate T. :wink:
 
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