Finding Tension from a Pulley

1. Oct 5, 2014

Mikey Faye

1. The problem statement, all variables and given/known data

4-31

2. Relevant equations

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

3. The attempt at a solution

only manage to reach 60kg x 9.8 = 588N

2. Oct 6, 2014

haruspex

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

3. Oct 6, 2014

Mikey Faye

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 sorta remember is there will be half of the weight in some pulleys and some doubled?

4. Oct 6, 2014

haruspex

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.

5. Oct 6, 2014

Mikey Faye

Two would be the same right?

6. Oct 6, 2014

haruspex

How many different tensions do you think there might be?