Simple Biomechanics: Levers

What is the fixed point around which a lever turns called?

• Effort

• Resistance

• Lever arm

• Fulcrum

Which class of lever has the fulcrum at one end and the resistance in the middle?

• Second class lever

• First class lever

• Third class lever

• Fourth class lever

In a first class lever, where are the effort and resistance forces applied?

• At the same end

• In the middle

• Opposite ends

• At the fulcrum

What is an example of a second class lever in the human body?

• Throwing a javelin

• Standing on tiptoes

• Nodding the head

• Bicep curl

Which muscle provides the effort in a bicep curl?

• Deltoid

• Biceps

• Gastrocnemius

• Trapezius

What type of lever is used when performing a forehand drive in tennis?

• Third class lever

• First class lever

• None of the above

• Second class lever

What does the resistance in a lever system refer to?

• The load or weight

• The effort applied

• The fulcrum

• The lever arm

Which of the following is NOT a component of a lever?

• Effort

• Torque

• Fulcrum

• Resistance

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

• At the opposite end

• At the fulcrum

• At one end

• In the middle

What is the role of the gastrocnemius muscle in a second class lever?

• Provides resistance

• None of the above

• Acts as the fulcrum

• Applies effort