Biomechanics revision quiz

What is the correct definition for Newton's 3rd law?

• An object either remains at rest or continues to move at a constant velocity, unless acted upon by a some external force

• For every action there is an equal and opposite reaction

• The acceleration of a body is proportional to, and in the same direction as, the unbalanced force applied to it

A second class lever has what in the middle?

• Fulcrum

• Resistance

• Effort

What are the most common types of levers in the human body?

• 3rd class

• 2nd class

• 1st class

How many classes of levers are there?

• 1

• 2

• 3

• 4

You determine what class a lever is by the part that is in the middle.

• True

• False

If the fulcrum is in the middle of the lever what class is it?

• 1st

• 2nd

• 3rd

• 4th

If the effort is in the middle of the lever what class is it?

• 1st

• 2nd

• 3rd

• 4th

If the load is in the middle of the lever what class of lever is it?

• 1st

• 2nd

• 3rd

• 4th

What class of lever is shone in the picture?

• 1st

• 2nd

• 3rd

• 4th

A lever is a rigid structure (bone/bar) that rotates around on an axis.

• True

• False