Biomech lesson 4

What is inertia?

• An objects ability to change shape

• The resistance of a body to change its state of motion, whether at rest or while moving.

• The resistance of a body to change its state of motion, only at rest

• The ability of a body to change its state of motion, whether at rest or while moving.

1.If an object is at rest, then there are no forces acting upon the object.

• True

• False

Which newtons Law is this?

‘A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force’

• Law of inertia

• Law of Acceleration

• Law of reaction

‘For every action force, there is an equal and __________ reaction force’

What is the correct term for the statement below?

“The sum of all forces acting on a body, also termed resultant force.

External force - comes from outside the body. We consider the forces of weight, reaction, friction and _______________

True or false?

•Internal force - generated by contraction of skeletal muscle

• True

• False

What is the unit for acceleration?

What is force measured in?

Tick all that apply

Forces can....

• Create motion

• Cause a body to change direction

• Cause a body to change shape

• Cause acceleration

• Cause deceleration