Transcript Newton`s Laws of Motion - Manhasset Public Schools

Newton’s Laws of
Motion
1st Law of Motion
(Law of Inertia)
A body at rest will remain at rest
A body in motion remains moving
UNLESS
a net force acts on the object.
1st Law of Motion
(Law of Inertia)
A body at rest will remain at rest
and
A body in motion remains moving
UNLESS
a net force acts on the object.
Egg Drop & Newton’s Laws
Inertia – resistance to
CHANGE
• Inertia is directly related to an
object’s mass.
• The more mass an object
contains, the more difficult to
change what it is doing.
• Inertia does not depend on the
object’s motion
Which ball has the most inertia?
Which has the least?
2nd Law of Motion
A net force will
cause a mass to
accelerate.
Fnet = ma
Fnet = net force
m = mass
a = acceleration
There is a direct relationship
between force and acceleration.
F
F
A larger force will cause a greater acceleration on the same
mass.
There is an inverse relationship
between mass and acceleration.
F
F
Larger masses will have a slower acceleration than lighter
masses for the same force.
3rd Law of Motion
Action-Reaction
For every action force, there is an equal but
oppositely directed reaction force.
F1
F2
F1 = -F2
All forces must come in pairs.
You cannot touch without being touched!