- #1

- 40

- 9

- Homework Statement
- Two blocks of mass m2 and m1 are put on a frictionless level surface as shown in the figure below. The static coefficient of friction between the two blocks is µ. A force F acts on the top block m2.

(c) Find the magnitude of the force F above which the block m1 starts to slide relative to the block m1.

- Relevant Equations
- F=ma

F=u*N

The block starts to slide if friction can no longer hold the block.

F=u*n and F=(m1+m2)a

so: (m1+m2)a=uN=>am1+am2=uN=>am2=(uN)/(am1)

So:am2=(uN)/(am1) is the force.

The answer is F=(u*m1g(m1+m2))/m2

I do not see how the acceleration terms are canceled. Is my answer equivalent to this?

F=u*n and F=(m1+m2)a

so: (m1+m2)a=uN=>am1+am2=uN=>am2=(uN)/(am1)

So:am2=(uN)/(am1) is the force.

The answer is F=(u*m1g(m1+m2))/m2

I do not see how the acceleration terms are canceled. Is my answer equivalent to this?

#### Attachments

Last edited: