Calculating Forces and Friction in a Two-Block System with a Spring

[Leata]

Homework Statement

a 30 kg is restin on a flat horizontal table. on top of this block rests a 15 kg block, to which a horizontal spring is attached, as shown in the drawing. the spring constant is 325N/m. the coefficient of kinetic friction between the lower block and the table is 0.600, and the coefficient of static friction between the two block is 0.900. a force F is applied to the lower block. this force is increasing in such a way as to keep the the blocks moving in a constant speed

Homework Equations

F=kx
Fk=usmg
Fs=usmg

The Attempt at a Solution

im clueless don't know where to start. please help guys

 

[tiny-tim]

Welcome to PF!

Hi Leata! Welcome to PF!

Show us what you've tried, and where you're stuck, and then we'll know how to help!

(oh, and what is the spring attached to?? )