What is the Tension in a Pulley System?

[Mikey Faye]

Homework Statement

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4-31

Homework Equations

Tension (Ft) = Force of gravity (Fg) = m × g.

The Attempt at a Solution

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only manage to reach 60kg x 9.8 = 588N

 

[haruspex]

Create unknowns for all the other tensions in the system. Many will be equal. What equations can you write down relating them?

 

[Mikey Faye]

Create unknowns for all the other tensions in the system. Many will be equal. What equations can you write down relating them?

thats where I am having trouble with or just misunderstanding. I am trying to remember what I learned about this before and something I can sort of remember is there will be half of the weight in some pulleys and some doubled?

 

[haruspex]

thats where I am having trouble with or just misunderstanding. I am trying to remember what I learned about this before and something I can sort of remember is there will be half of the weight in some pulleys and some doubled?

You don't need to remember anything like that. Can you figure out which tensions will be the same? For each pulley, you know that the sum of forces on that pulley will be zero. That gives you the equations you need.

 

[Mikey Faye]

You don't need to remember anything like that. Can you figure out which tensions will be the same? For each pulley, you know that the sum of forces on that pulley will be zero. That gives you the equations you need.

Two would be the same right?

 

[haruspex]

Two would be the same right?

How many different tensions do you think there might be?