Understanding Simple Machines and IMA

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

• Wheelbarrow

• Seesaw

• Tweezers

• Door

In a second class lever, where is the load located?

• Between the fulcrum and the effort

• At the fulcrum

• At the effort

• None of the above

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

• Crowbar

• Nutcracker

• Fishing rod

• Scissors

What is the primary function of a wheel and axle system?

• To increase speed

• To change direction

• To reduce friction

• To amplify force

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

• At one end

• Between the effort and the load

• At the load

• At the effort

Which of the following systems has an Ideal Mechanical Advantage (IMA) less than 1?

• First class lever

• Second class lever

• Third class lever

• None of the above

What is the formula for calculating the Ideal Mechanical Advantage (IMA) of a lever?

Which of the following is NOT a characteristic of a wheel and axle system?

• It consists of two circular objects of different sizes.

• It can change the direction of a force.

• It can be used to amplify force.

• It always has an IMA less than 1.

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

• At the end of the rod

• At the fulcrum

• At the load

• None of the above

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

• Hammer

• Nutcracker

• Broom

• Pliers