Solving a pulley system (Dynamics)

[mmanor]

Solving a problem about a pulley system (dynamics)

A 100 kg crate is supported by a rope which passes over a 25 kg pulley. A 2nd rope connects the pulley to the ceiling. The system is stationary.

ƩFx=0 ƩFy=0

I am having problems setting up the free body diagram to start the problem!

 

[haruspex]

Where does the other end of the first rope go? Are both ends attached to the crate?

 

[TamuNinja]

well using the information that you gave which is not very clear.

Your freebody diagram would be:

mg acting downward on the 1000kg block and Tension (T) acting upward on the block

Thats just for the block.


There are no foces acting in the X axis

ƩF_y=o=T-mg (this is the sum of forces acting on the block)


Now the info that you gave in your original post was not very clear.. Please correct me if i missed anything and i will go back and make sure i correct everything.

 

[aralbrec]

You haven't stated what you are trying to find. It sounds like you want to find the tension in the rope connected to the ceiling. In that case you need a free body where that tension appears.