Levers

What is the primary function of levers in the human body according to the text?

• To decrease force and speed

• To increase force and/or speed

• To support body weight only

• To connect different body parts

Which of the following is NOT a component of a lever as described in the text?

• Force

• Axis or fulcrum

• Resistance

• Energy

How do some sports utilize levers to enhance performance?

• By using equipment to reduce force

• By using equipment as extended levers to generate greater force and higher ball velocity

• By using equipment to decrease speed

• By using equipment to balance the player

What is the correct description of a first class lever?

• Axis is in the middle, with resistance and force on either side.

• Resistance is in the middle, with axis and force on either side.

• Force is in the middle, with axis and resistance on either side.

• Force and resistance are at one end, with the axis at the other.

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

• At one end, with force at the other end.

• In the middle, with axis and force on either side.

• At the axis, with force at one end.

• In the middle, with force at both ends.

Which statement best describes a third class lever?

• The axis is at one end, with force applied in the middle.

• The resistance is at one end, with the axis in the middle.

• The force is applied in the middle, with the axis at one end.

• The force and resistance are at opposite ends, with the axis in the middle.

In a first class lever, where is the axis located in relation to the force and the resistance?

• The axis is between the force and the resistance.

• The axis is at one end, with the force and resistance on the same side.

• The axis is outside the lever system.

• The axis and the force are at opposite ends with resistance in the middle.

What is a characteristic feature of second class levers?

• The resistance is between the axis and the force.

• The force is applied at the end opposite to the resistance.

• The axis is located at the end, with force applied in the middle.

• The force and resistance are at the same point.

Which of the following is an example of a second class lever action in the human body?

• Nodding head forward and back.

• Jumping upwards during a layup in basketball.

• Down phase of a sit up.

• Raising your head to header a football.

What does the mnemonic "ARF" stand for in the context of second class levers?

• A Real Function

• A Rapid Force

• A Real Fight

• Axis Resistance Force