1. The problem statement, all variables and given/known data A block with a mass of 100kg is being pulled with a force P in and effort to move it down the ramp. The ramp makes a 20 degree with the horizontal ground. The coefficient of the friction between the ramp and the block is 0.7. Find the frictional force and the horizontal force. Assume g=10m/s^2 2. Relevant equations Inclined plane equations 3. The attempt at a solution Let F(y) = vertical force due to gravity. F(py) = vertical force due to applied force. F(x) = horizontal force due to gravity F(px) = horizontal force due to applied force P. F(yNet) = Total vertical net force = F(y) - F(py) = mg(cos(theta)) - P(sin(theta)) = 1000cos20 - Psin20 F(xNet) = Total horizontal net force = F(x) + F(py) = mg(sin(theta)) - P(cos(theta)) = 1000sin20 - Pcos20 Am I doing it right above? Let F(N) be the normal force. My rationale is that since the horizontal force P lifts the mass upwards, it's force acting downwards will be reduced. Am I right to say that, F(N) = F(yNet) Normal force = The net force acting vertically downware to the ramp. Am I getting the concept right or wrong? I am now stuck at this part because I have so many unknown. I still can't find P. Can someone correct my understanding? Thank you all.