Newton’s Laws of Motion

10.01.12

Warm-upChoose a word in parentheses to complete the statements.1. If forces are in the same direction their

magnitudes can be (added, subtracted).2. If forces are in the opposite direction their

magnitudes can be (added, subtracted).3. If an object is accelerating or changing

direction, then the forces are (balanced, unbalanced).

Learning target

• I can explain how inertia and momentum affect an object’s motion.

Four-square(inertia and momentum)

Definitions Description

Sketches Relationship

DoL

For each of the statements:

I inertia

M momentum

B both

N neither

1. Measure of how hard it is to stop an object.

2. Air bags and seat belts help you from getting injured due to _____.

3. p = (m)(v)4. A car traveling the same

speed as a bicycle has more ______.

5. Help to explain Newton’s Laws of Motion.

Warm-up

Explain the differences between momentum and inertia.

Use glossary if necessary

Learning target

• I can summarize Newton’s Laws of Motion.

Newton’s First Law of Motion

Definition• Balanced forces = no

change in motion• Unbalanced forces = change

in speed or direction

Explanation• An object at rest will remain

at rest• An object in motion will

remain in motion unless acted upon by an unbalanced force

Newton’s Second Law of Motion

Definition• Force = mass times

acceleration• F=ma

Explanation• More force to move a more

massive object• More force to accelerate an

object more

Newton’s Third Law of Motion

Definition• Every action has an

opposite and equal reaction

Example• Rowing a boat

DOL

• A runner moves up to the starting line. The starter fires the gun to begin the race and the runner takes off down the track. As she crosses the finish line, she begins to slow herself to a stop.– Explain how all three of Newton’s Laws of Motion

apply to this situation. Give specific examples.

Science Fair Brainstorming• On notebook paper…– What category are you interested in entering?• Biology• Health and Behavioral Science• Physical Science• Engineering/Mathematics/Computer Science• Earth Science

– What ideas do you have for Science Fair?• Testable question• Potential topics• Areas of interest

Warm-upFill in the blank.1. __________ forces cause a change in motion

while _________ forces do not.2. __________ is a measure of how difficult it is to

stop an object.3. __________ is an object’s resistance to changes

in its motion.4. __________ equals mass times velocity.5. Every __________ has an opposite and equal

__________.

Learning Target

• I can explain how Newton’s Laws of Motion apply to various activities and moving objects.

ExampleMountainBiking

Newton’s First Law of Motion

If forces are extremely unbalanced on the front wheel, then inertia will cause you to crash.

Newton’s Second Law of Motion

More force applied to the pedals results in quicker acceleration

Newton’s Third Law of Motion

The action of pulling on the brakes causes the reaction of the brakes being applied to the wheels.

Assignment1. Fold paper into quadrants.2. Choose an activity or object that involves motion.3. Sketch a diagram in the first quadrant showing your

activity.4. In each of the next three quadrants, give a detailed

explanation or specific example of how each of Newton’s Laws of Motion apply to the activity or object.

5. Talk with four other students in class and take notes in each quadrant using the back of the paper.

DOL - matching

1. NFLM2. NSLM3. NTLM

a) Also known as the law of inertia

b) Force equals mass times acceleration

c) Every action as an opposite and equal reaction