- #1

bassplayer142

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## Homework Statement

Two blocks attached by a string are at rest on an inclined surface. The Lower Block has a mass of m1=0.2Kg and a coefficient of static friction u=0.4. The upper block has a mass m2=0.1Kg and a coefficient of static friction u=0.6. The angle theta is slowly increased.

Mass 2 is above Mass 1 in the picture!

Also theta is above the horizontal!

## Homework Equations

Here are the questions it is asking for.

a)At what angle theta do the blocks begin to slide?

b)What is the tension in the string just before sliding begins?

I have a few questions myself about the setup.

Does the mass of the blocks have any revelence to the acceleration down the ramp? Or will there be tension in the string solely for the fact that the coefficent of friction for the upper block is higher making it move slower. I doubt a physics book would want do a problem where the rope is slack and the blocks collide. At least not in Newtons chapter about forces.

## The Attempt at a Solution

I made the sum of forces for both i and j vectors for both blocks. I solved for the general equation of force normal and friction force for both blocks. Note that they are both the same equations.

Now I have theta, acceleration, and tension as unknown variables. What do I do next?

By the way thanks in advance for any help. And how do you guys actually use greek and mathmatical symbols in your text?