Levers

Which of the following is a key component of a lever?

• Speed

• Force

• Distance

• Time

In the human body, what works together to make up lever systems?

• A) Bones, muscles, and joints

• B) Heart and lungs

• C) Skin and hair

• D) Eyes and ears

Levers are classified depending on the location of the axis, force, and resistance. Which class of lever has the axis in the middle?

• A) First class lever

• B) Second class lever

• C) Third class lever

Levers are classified depending on the location of the axis, force, and resistance. Which class of lever has the resistance in the middle?

• A) First class lever

• B) Second class lever

• C) Third class lever

Levers are classified depending on the location of the axis, force, and resistance. Match the following lever classes with their characteristics:

• Second class lever

• Force is in the middle

• Third class lever

• Axis is in the middle

• First class lever

• Resistance is in the middle

In a second class lever, what is the position of the 'resistance'?

What is the position of the 'force' in third class levers?

• Between the axis and the resistance

• Quadriceps

• Furthest away from the axis

• Hips

Fill in the blank: In an AFL kick, the axis is the ______ joint.

• axis joint

• knee joint

• elbow joint

• hip joint

What is the relationship between the length of a lever and its velocity?

• A) The velocity is greater at the end of a short lever.

• B) The velocity is greater at the end of a long lever.

• C) The velocity is the same for both long and short levers.

• D) The velocity is greater at the middle of a lever.

A baseball batter should grip the bat at the end and straighten elbows to make the lever as long as possible for speed because:

• it increases the swing speed by maximizing the lever length.

• it decreases the swing speed by minimizing the lever length.

• it has no effect on the swing speed.

• it makes the batter look more professional.