Solution: Determine the force parallel to the incline that must be applied

Solution: Find the weight of the heavier boy

Solution: Find the reaction at support A

Solution: Find the reactions if reaction A is at the left end and reaction B at the right end

Solution: Find the length of the beam

Solution: How much closer must the fulcrum be to the stone then to his hand?

Solution: What is the frictional resistance of the ramp?

Solution: What is the force tending to move the block down the ramp?

Solution: How much pull must one exert to bring the weight up the plane?

Solution: What direction should the boat head?