Mathematician and Scientist

1643 - 1727

Newton thought the universe worked like a

machine and that a few simple laws

governed it.

OUCH! Hey, this must be

gravity!

Help! Whiplash!

INERTIA Oops!

My bad!

Explain how inertia is displayed in each movement.

What would happen if the person driving this car isn’t wearing a seat belt and hits

the brick war? Explain why using Newton’s 1st Law of Motion – “Inertia”.

http://www.physicsclassroom.com/Class/newtlaws/U2L1b.html

The Second Law governs all acceleration and is really

very simple -- acceleration is produced when a force

acts on a mass. The greater the mass (of the object being accelerated) the

greater the amount of force needed (to accelerate the

object). http://www.physicsclassroom.com/mmedia/newtlaws/efar.html

With air resistance

As mass in

creases,

acceleratio

n has to

decrease

Free fa

ll – N

o air

resistance

http://www.physicsclassroom.com/mmedia/newtlaws/efff.html

Heavier objects require more force to move the same distance than do lighter objects. The Second Law,

however, gives us an exact relationship between force, mass,

and acceleration.

ACCELERATION = FORCE

MASS

FORCE = MASS X ACCELERATION

F = M * A

A = F

M

Mike's car, which weighs 1,000 kg, is out of gas. Mike is trying to push the car to a gas

station, and he makes the car go 0.05 m/s/s. Using Newton's 2nd Law, you can compute how much force Mike is applying to the car. (hint: since you are trying to find force, use

the equation F=MA).

BOB's van, which weighs 2,000 kg, is out of gas. BOB is trying to push the van to a gas

station, and he makes the car go 0.05 m/s/s. Using Newton's 2nd Law, you can compute how much force BOB is applying to the car. (hint: this problem is just like the previous

one).

http://www.physicsclassroom.com/Class/newtlaws/U2L3a.html

Every acti

on has an

equal and opposit

e

reacti

on

http://www.physicsclassroom.com/Class/newtlaws/U2L4a.html

WHACK! Ugh! ZOOM!

A variety of action-reaction force pairs are evident in

nature

http://www.intel.com/education/projects/wildride/learning/inspiration.htm

• Pair up with 1 student.

• As the teacher models, use Microsoft Word or Inspiration software to design a graphic organizer illustrating each law.

• Use the link below for models.