3. Consider a block on a tilted plane as shown. The figures after the numbers 1) - 7) represent possible free body diagrams. 6) 1) 2) 4) 5) 7) a) Which free body diagram best represents the forces on the block if it is stationary on the incline? 5X b) Which free body diagram best represents the forces on the block if it is moving up the incline with constant speed? = no acceleration 4 c) Which free body diagram best represents the forces on the block if it is moving down the incline without acceleration? X sin