Force Motion

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50 N

100 N

100 N

50 N

50 N

50 N

Slide 40

NEWTON’s

3rd Law of Motion:

For every action there is

an equal and opposite reaction.

Conservation of energy

Slide 41

NEWTON’s

3rd Law of Motion:

For every action, there is

an equal and opposite reaction.

Slide 42

NEWTON’s

3rd Law of Motion:

For every action, there is

an equal and opposite reaction.

Slide 43

Slide 44

Balanced or unbalanced?

Action

Reaction

Gravity Inertia Friction

Slide 45

Gravity

balanced

UN

Time (mSec)

Speed (m/s)

BALL

Ground

Slide 46

Inertia

balanced

UN

Time (mSec)

Speed (m/s)

BALL

PUTTER

Slide 47

Friction

balanced

UN

Time (Sec)

Speed (m/s)

SKATE

Slide 48

A car is traveling down a hill. Which of the following will affect the amount of energy the car has?

how long the car is

the time of day

how much the car weighs

the color of the car

Slide 49

Friction

the resistive force that occurs when two surfaces travel past each other.

causes physical deformation

generates heat

Slide 50

Friction

the resistive force that occurs when two surfaces contact each other.

Slide 51

Oliver the dog doesn't want to walk in the rain. He can make his owner pull harder on the leash to get him out the door by sitting on the vinyl floor. sitting on the tile floor. sitting on the carpeted floor. sitting on the wood floor.

Slide 52

Pauline needs to measure the sliding friction of a brick. How should she go about doing this?

attach the brick to a string and then to a spring scale and read the force needed to quickly lift the brick off the ground

drag the brick by a string attached to a spring scale so that it gradually speeds up