Be careful with what you put as theta, remember that the angle is between the direction of the force and the direction of motion. You will need to account for the angle of the ramp. Angle of ramp = 5.69 degrees m = 756.2 grams d = 0.5 meters Work Done by Gravity Wg Uphill Downhill 0 degrees 60 degrees The work done by the normal force is OJ because the normal force is always 90 degrees to the direction of motion. Sum of work (Wg + Wp) Uphill Downhill 0 degrees 60 degrees