Fulcrum Help

Question

A 340-pound weight lifter needs to lift a 650-pound stone to win a competition. If he uses a 36-foot bar with the fulcrum placed 6 feet from the stone, will he be able to win the competition?

Answer 1

The moment of force applied by the weight lifter must exceed the moment of force applied by the weight.

 

Is (340 lbs) [(36 - 6) ft] ≥ (650 lbs) (6 ft) ?

 

(340)(30) = 10,200

 

(650)(6) = 3,900

 

10,200 > 3,900

 

He can do it.