Practice Problems 10

W in = W out F in d in = F out d out AMA = F out IMA = d in % efficiency = AMA X 100F in d out IMA2.) Daniel wants to lift a 8 kg box which sites .75 m from the fulcrum of a lever. Daniel applies a force of10N. a) How far from the fulcrum is Daniel positioned?b.) What is the IMA of this lever? What does this IMA mean?c.) How many times does the lever actually multiply the force that Daniel exerted on the lever if Danielactually pushed down with 25 N of force? What does this AMA mean?d.) What is the efficiency of this lever? What does this percentage mean?

W in = W out F in d in = F out d out AMA = F out IMA = d in % efficiency = AMA X 100F in d out IMA3. Caitlin pushes a 500 N box up an incline that is 4 m long and 1.2 m high.a.) What force does Caitlin apply to push the box up the ramp?b. ) What is the work input?c.) What is the IMA of the ramp? What does this number mean?d. ) What is the AMA of the ramp if Caitlin actually pushes the box up with a force of 250 N? What doesthis number mean?e.) What is the efficiency of the ramp? What does this percentage mean?

W in = W out F in d in = F out d out AMA = F out IMA = d in % efficiency = AMA X 100F in d out IMA4.) Riley pushes a 600N box up a 10m long slope that elevates the box a vertical distance of 1m.a.) What is the force that Riley must apply to the box to move it to the top of the slope?b. What is the IMA of the slope? What does this number mean?c. What is the AMA of the slope if Riley actually pushes the box up the slope with 200 N of force?What does this number mean?d. What is the efficiency of the slope? What does this number mean?

W in = W out F in d in = F out d out AMA = F out IMA = d in % efficiency = AMA X 100F in d out IMA5.) Kaiya uses a lever to raise a 100 N boulder. The boulder is .5m from the fulcrum. Kaiya is positioned1.25m from the fulcrum. What force does Kaiya use to lift the boulder?b.) What is the IMA of the lever? What does this number mean?c.) What is the AMA of the lever if Kaiya actually applies 65 N of force to the lever? What does thisnumber mean?d.) What is the efficiency of the lever? What does this percentage mean?

W in = W out F in d in = F out d out AMA = F out IMA = d in % efficiency = AMA X 100F in d out IMA6. Clyde a stubborn 3500N mule refuses to walk into the barn, so Farmer Macdonald must drag him up a5 m ramp to his stall, which stands .5 m above ground level.a.) What force did Farmer Macdonald use to drag Clyde up the ramp?b.) What is the IMA of the ramp? What does this number mean?c. ) What is the AMA of the ramp if Marcus actually pushes the mule up with a force of 650 N?What does this number mean?d.) What is the efficiency of the ramp? What does this percentage mean?

Fin din = Fout dout AMA = F out IMA =d in efficiency = AMAF in d out IMA7.) The Addams family is moving to a new town and have hired a moving company. Josh one of themovers slides the Addams’ 2200 N china cabinet up a 8.0 m ramp to the moving van, which stands 1.5 moff the ground.a.) What force does Josh need to use to push the china cabinet up the ramp?b.) What is the IMA of the ramp? What does this number mean?c. ) What is the AMA of the ramp if Josh actually pushes the china cabinet up with a force of 650 N?What does this number mean?d.) What is the efficiency of the ramp? What does this percentage mean?