# Dynamics problem

1. Feb 5, 2006

### xc630

Hi I need soem help on thsi problem

A 1500N block sits at rest on a ramp inclined at 40.0 degrees. The coeffeicients of starting and kinetic friction are 0.100 and there is a force of 250N applied up the ramp. I have to find the acceleration and net force. But how can I find the net force if I can't use sigmaFx= ma?

2. Feb 5, 2006

### finchie_88

Try resolving the forces acting on the block parallel and perpendicular to the plane, then you can use the components of each force.
e.g., weight becomes $$W_h = mgsin40$$ and $$W_v = mgcos40$$ for the horizontal and vertical components respectively.

3. Feb 5, 2006

### xc630

What would I be solving for?

Last edited: Feb 5, 2006