Typical Forces and friction question

[notwhatthe]

[solved] Forces and friction

Hi guys :]

Homework Statement

A box (A) slides up a ramp due to the mass of the attached box (B).
Given the acceleration and ramp length, determine the force of tension and force of kinetic friction.

Homework Equations

Fnet=ma
Fg=mg

The Attempt at a Solution

I only got as far as finding the Fnet by multiplying the combined masses and given acceleration. Where do I go from here?
I don't need numerical values, just.. can someone enlighten me on how I should approach this question, so I can find the kinetic friction and tension forces?

Any help is greatly appreciated, thanks !

 

[sealedhuman77]

I think kinetic friction is found by multiplying the friction coefficient by normal force. So the normal force must be found. Not really sure about tension.

 

[Moetasim]

Hello!

To find the tension force, you will need to use the equation Fnet = ma and isolate for the tension force. Since the box is sliding up the ramp, the net force will be equal to the kinetic friction force minus the weight force (Fnet = Fk - Fg). You can then substitute the equation for kinetic friction (Fk = μkN) and solve for the tension force.

To find the kinetic friction force, you will need to use the equation Fk = μkN, where μk is the coefficient of kinetic friction and N is the normal force. The normal force can be found by using the equation N = mgcosθ, where θ is the angle of the ramp.

I hope this helps you approach the question and find the necessary forces. Remember to always start with the given information and use the appropriate equations to solve for the unknown values. Good luck!