How much work is done against gravity by a workman carrying an 8-kg sheet of plywood up a 3-m ramp inclined at an angle of 20° to the horizontal?
I get that the answer is 80.44 but can some explain the diagram portion of it. Why do we take cos 70º?
I get that the answer is 80.44 but can some explain the diagram portion of it. Why do we take cos 70º?