1. The problem statement, all variables and given/known data Person pushing a block with mass m on an inclined plane with angle [theta]. The friction coefficient is u. If the force applied is constant and parallel to the slope of the plane, show that the acceleration ax of the block in the direction of motion can be expressed as : ax=(P/m)-g(u*cos[theta]+sin[theta]) 2. Relevant equations Force = P Mass = m Gravity = g Friction coefficient = u Force = mass*acceleration 3. The attempt at a solution First I drew the free body diagram, but I'm seriously lost coming up with equations. My book has nothing but vague allusions to formulae (with no examples whatsoever), and the internet is rife with blocks sliding down planes, but barren regarding blocks being pushed up them. Furthermore, the problem does not give information concerning the distance the block is pushed, nor does it include that measure in the "final answer" I'm supposed to solve for, but I thought distance was essential to measuring acceleration. Anyways, I'm lost here, folks. My physics acumen is lacking, to say the least, and the fact that my book asks these little "concept" questions while seeming deliberately wordy and mystifying only serves to frustrate me further. Help please.