Understanding Levers and Mechanical Advantage

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

• Wheelbarrow

• Seesaw

• Tweezers

• Fishing rod

In a second class lever, where is the load positioned relative to the fulcrum and effort?

• Between the fulcrum and the effort

• At the end, opposite the fulcrum

• Between the effort and the fulcrum

• At the fulcrum

Which of the following is a real-life example of a third class lever?

• Crowbar

• Nutcracker

• Human forearm lifting a weight

• Scissors

What is the mechanical advantage (MA) of a lever if the effort arm is 2 metres and the load arm is 0.5 metres?

• 0.25

• 0.5

• 2

• 4

Which of the following statements about mechanical advantage is correct?

• Mechanical advantage is always less than 1 for all levers.

• Mechanical advantage is measured in newtons.

• Mechanical advantage is only relevant for first class levers.

Which of the following is NOT an application of a second class lever?

• Wheelbarrow

• Bottle opener

• Door

• Scissors

If a lever has a mechanical advantage of 3, what does this mean?

• The effort required is three times greater than the load.

• The lever multiplies the effort force by three.

• The load arm is three times longer than the effort arm.

• The lever cannot lift the load.

Which of the following best describes the arrangement of a first class lever?

• Effort – Load – Fulcrum

• Load – Fulcrum – Effort

• Fulcrum – Load – Effort

• Fulcrum between effort and load

A person uses a crowbar (first class lever) with an effort arm of 1.5 metres and a load arm of 0.5 metres. What is the mechanical advantage?

• 0.33

• 1

• 2

• 3

Which of the following is a correct example of a second class lever used in daily life?

• Broom

• Nutcracker

• Fishing rod

• Tongs