Alright awesome forum people! I need your help!
This has been a long week, and I might not be thinking as well as I would like, it might explain any herp derp mistakes I made.
Me and my 11th grade physics teacher are in a bit of a stand-still. We are having a little disagreement on a problem we did today.
We have a bloc (2kg) on an inclined plane (25 degrees, angled up). Supporting this block (bellow, so the block does not slide off the plane.) is a spring with a strength of 50n/m. The friction coefficient (cinematic, we neglect the other) is 0.2. This system as a whole is at rest.
Now, we add a constant force pulling at the block with 10N, angled 10 degrees up relative to the inclined plane.
The question is: What is the speed of the block when it has moved 20 centimetres?
But my problem is that the forces seem to balance out when the spring is stretched about 19.3 centimetres... there does not seem to be a way for the block to actually get to 20 centimetres in the fist place.
So, what did I do wrong?