Biomechanics Year 12

What is the correct definition of Newton's Law of Inertia

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

• 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

2nd Class Lever have what in the middle?

• Load

• Fulcrum

• Effort

• Lever

What is Newton's First Law also known as?

• The law of reaction

• The law of inertia

• The law of acceleration

For a first class level, the fulcrum is placed

• Between the effort/force and resistance/weight

• Effort/force in the middle with fulcrum on one end and resistance/weight on the other

• Resistance/weight in the middle with fulcrum and effort/force on the ends

Standing on your toes is an example of what lever

• 1st class

• 2nd class

• 3rd class

What law best describes the action when a high jumper is pushing off the ground before the jump?

• Newton's 1st law (inertia)

• Newton's 2nd law (acceleration)

• Newton's 3rd law (reaction)

What class lever occurs at the neck when nodding your head

• 1st class

• 2nd class

• 3rd class

What class lever is the arm using when a dart thrower is holding a dart up getting ready to throw?

• 1st class

• 2nd class

• 3rd class

What force DOES NOT act on a football to slow it down once it is kicked

• Wind resistance

• Friction

• Gravity

• Humidity

The centre of mass is

• Always the middle point of a body

• The point of balance of a body

• The weight of the person

• Always in the same place