Physics Homework: Finding Mass of Block with Applied Force and Acceleration

[yogoes123]

Homework Statement

Block is pushed across a horizontal surface with a coefficient of kinetic friction of 0.15 by applying a 150N horizontal force

the block accelerates at a rate of 2.53m/s^2 find the mass of the block

Homework Equations

Uf=ff/fn f=ma

The Attempt at a Solution

0.15=?/fn f=m2.53


I tried crazy solutions but no progress

The TB answer is 38kg. I have no idea what this 150N of force is, i tried using it as the net force or frictional force but it didnt work, what is it and what do i do?

 

[Trade]

0.15 is the coefficient of friction. So in this case the frictional force will be,

F(friction) = F(gravity)(.15)

Try drawing a free body diagram with the applied force (that's the 150N it's talking about) and the force of friction and try to figure it out. Remember F=ma