NEWTON’SLAWS OF

MOTION

Created By: Mr. Mossey

NEWTON’SFIRST LAW OF MOTION

Basic Idea: Inertia = Resistance to change in motion.

LAW:

Objects at rest will remain at rest and objects in motion will remain in motion at constant velocity unless acted on by an unbalanced force.

When the blue ball starts moving the red ball resists motion. (Objects at rest stay at

rest)

Newton’s First Law: Inertia

When the blue ball stops moving the red ball continues motion. (Objects in motion stay

in motion)

The truck is stopped by an unbalanced force.

The ladder keeps going!

The spaceman stays at rest,

until an unbalanced force causes movement.

Newton’s First Law: Inertia

NEWTON’SSECOND LAW OF

MOTIONBasic Idea:

LAW:

Force is related to mass and acceleration.

Force = (Mass) (Acceleration)

Standard Unit of Force = Newton (N)

Newton’s Second Law: F = ma

Small Mass

Large Mass

Equal Force

accelerates quickly from force

accelerates slowly from same force

Newton’s Second Law: F = ma

Small Force

Large Force

Same Mass

Accelerates mass quickly

Accelerates same mass slowly

NEWTON’STHIRD LAW OF

MOTIONBasic Idea:

LAW:

Forces come in pairs.

For every action there is an equal and opposite reaction.

Newton’s Third Law: Action/Reaction

Man pushes off left (Action)

Man travels right (Reaction)

ACTIONREACTION

Newton’s Third Law: Action/Reaction

Bear applies

action force on

ground

Reactio

n forc

e

from

gro

und sends

bear up

Action Down:

Reaction Up

SUM UP

NEWTON’S LAWS

First Law:

Forces are necessary to change objects motion.

Second Law:

Forces are related to mass and acceleration.

Third Law:

Forces come in pairs.