A block is shown on a frictionless inclined plane. At the instant shown, the block is moving up the plane (it had been pushed just before). What two forces are acting on the block? Use a red pencil to sketch a free body diagram of the forces on the block. Place the tail of each force vector at the center of the block. Sketch the normal force vector rst. There is no \"correct length\" to sketch a single force vector. However, please make the normal force vector about 2\" long. Now sketch the weight vector with the correct length. To determine the correct length, you need to recall that 2 F = mi, and realize the block always remains in contact with the plane. although there is no correct length for an arrow representing a single force, make sure that the length of each force vector is proportional to that s an arrow that is twice as long. You must understand that, we must, to the best of our ability, force. A force that is twice as large must be drawn a in many cases, we may not know the exact relation between forces. In that case, we try to at least use larger arrows to represent bigger forces. Graphically add the force vectors to get the total force on the block