# Homework Help: Pulley problem with 2 masses and an incline

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1. Oct 3, 2015

### lilmulla

1. A mass on a flat surface is pulled with an angled force of 200N (as shown) and is connected by a massless rope/pulley to another mass below on an incline. Find the acceleration and Tension in the rope.

2. Relevant equations
Fnet = ma
Fg = mg
Ff = Mu x Fn

3. The attempt at a solution
Had a question like this except with different masses/angles on a quiz and wanna make sure I did it right.

Would the equation for M1 be Fnet = Fappx - Ft - Ff

And for M2:
Fnet = Ft - Ff - Fgx

And then you turn Fnet into ma, combine the two equations to make Ft cancel out, then solve for a since acceleration is the same for both masses in a pulley system?

Here's a pic of the problem: (won't let me upload from my phone)

http://m.imgur.com/1nYJKh4

Mentor's Note: Here's a visible version:

Last edited by a moderator: Oct 3, 2015
2. Oct 3, 2015

### Yashbhatt

Yes. This looks right.

3. Oct 3, 2015

### lilmulla

Great! And for the normal force on M1 (to figure out friction), would it be M1g - 200sintheta ?

4. Oct 3, 2015

### haruspex

Yes. But you have not said what you mean by Fgx and Ff for M2.

5. Oct 3, 2015

### lilmulla

Oh, I meant Fgx is the x component of the force of gravity so (mgsin30) and Ff is = Fn which is equal to the y component of Fg so Ff = (0.2 x mgcos30)