1. If Box A weighs 20 pounds and sits 13 inches left of the fulcrum and Box B weighs 10 pounds and sits 11 inches left of the fulcrum, how much must Box C weigh if it sits10inches to the right of the fulcrumto balance the lever?

2. How far from the fulcrum would a force of 209pounds need to be applied to lift a box weighing 46pounds resting 47inches from the fulcrum of a 3rd class lever?

calculate your answer to one decimal place

3. How far left of the fulcrum must Box A sit to balance the leverif it weighs 7pounds& Box B weighs 15 pounds and sits 14 inches left of the fulcrum and Box C weighs 13 pounds and sits 22 inches right of the fulcrum?

4. How much force would need to be applied 11inches from the fulcrum to lift a box weighing 49pounds resting 25inches from the fulcrum of a 3rd class lever?

5. How much force would be required to lift a box weighing 235 pounds sitting 11 inches from the fulcrum if the force was applied 26 inches from the fulcrum of a 2^nd class lever?

6. If Box A weighs 25.7pounds and sits 16.4inches left of the fulcrum,how far right of the fulcrum must Box B sit to balance the lever if Box B weighs 74pounds?

7. How far from the fulcrum would a force of 41 pounds need to be applied to lift a box weighing 108 pounds sitting 13 inches from the fulcrum of a 2^nd class lever?

8. If Box A weighs 98.6 pounds and sits 54.6 inches left of the fulcrum, how much must Box B weigh if it sits 26 inches right of the fulcrum to balance the lever?

9. How much must Box A weigh to balance the leverif it sits 10 inches left of the fulcrum & Box B weighs 7 pounds and sits 7 inches left of the fulcrum and Box C weighs 20 pounds and sits 12 inches right of the fulcrum?

10. If Box A weighs 5.8 pounds and sits 9 inches left of the fulcrum and Box B weighs 5.4 pounds and sits 17 left of the fulcrum, how far to the right of the fulcrum must Box C sit if it weighs 10 poundsin order to balance the lever?

Answer rating: 100% (QA)

To solve these lever balance problems we can use the principle of moments which states that for an object to be in equilibrium the sum of the clockwis... View the full answer