- #1

navneet9431

Gold Member

- 107

- 9

## Homework Statement

A block m2 is placed on a surface where the coefficient of friction is μ2 and another block m1 placed over the block m2 where the coefficient of frictio is μ1.

A force F=k*t(Force as a function of time),is acting on the block m2.

Now my question is that when would the block m2 start moving?

## Homework Equations

F=ma

Static Friction=Coefficient Of Friction*Normal Force

## The Attempt at a Solution

I tried solving this by drawing the FBD of the objects.

See two forces fr1 and fr2 will be acting on the block m2.

So m2 would start to move when F>fr1+fr2.

Or simply we can say k*t=fr1+ft2.

So the block m2 would start to move just after time "t".

Is my result correct?