Levers

What is the primary function of a lever in terms of force?

• To increase the amount of force needed

• To decrease the amount of force needed

• To eliminate the need for force

• To maintain the same amount of force

Which part of a lever is responsible for its pivoting action?

• Load

• Effort

• Fulcrum

• Rod

In a class one lever, where is the fulcrum located?

• At one end

• In the middle

• At the load

• At the effort

How does increasing the distance over which you exert force on a lever affect the amount of force needed?

• It increases the force needed

• It decreases the force needed

• It has no effect on the force needed

• It doubles the force needed

Which of the following is an example of a class two lever?

• Seesaw

• Wheelbarrow

• Tweezers

• Arm

In a class three lever, where is the effort applied?

• At one end

• In the middle

• At the fulcrum

• At the load

What is the relationship between effort and distance in lever mechanics?

• Effort and distance are inversely related

• Effort and distance are directly related

• Effort and distance are unrelated

• Effort is always greater than distance

Which of the following statements is true about class one and class two levers?

• The effort needed is always greater than the load

• The effort needed is smaller than the load

• The fulcrum is always at the load

• The load is always at the effort

What happens to the force needed to lift a load if the fulcrum is moved closer to the load in a lever?

• The force needed increases

• The force needed decreases

• The force needed remains the same

• The force needed doubles

Which of the following is a characteristic of class three levers?

• The load is between the fulcrum and effort

• The effort is greater than the load

• The fulcrum is in the middle

• The load is at one end