Transcript Newton`s First Law

Motion
* Why do like really big slow moving ships run into
like really big stationary continents?????
* What is the relationship between force and motion?
Motion
Vis Insita
Power of Resting
Motion
Vis Insita
…vis insita, …may…be called inertia
Isaac Newton
From the Latin word meaning “idleness” or “laziness”
Motion
Fundamental Quantity – Mass
Motion
Fundamental Quantity – Mass
The amount of stuff in an object
Motion
Fundamental Quantity – Mass
The amount of stuff in an object
Mass is a measure of inertia.
Motion
Fundamental Quantity – Mass
The amount of stuff in an object
Mass is a measure of inertia.
* “High” mass → “High” inertia
Motion
Fundamental Quantity – Mass
The amount of stuff in an object
Mass is a measure of inertia.
* “High” mass → “High” inertia
* “High” mass → “Harder” to change motion
Motion – Newton’s Laws
1. Every body continues in its state of rest or uniform
motion unless it is acted upon by a net external force.
b
Motion – Newton’s Laws
Case Study: Houston,
we have a problem..
A malfunction in Apollo 13 caused gasses to vent
into space and then crystallize. Even though the
crystals had left the spacecraft, they continued to
move along next to the capsule. The navigation
system used stars as “finders” to maintain
course, but with all the crystals surrounding the
capsule, the navigation system was not able to
distinguish a star from a crystal.
Why did these crystals stay with the spacecraft,
rather that “drift away” once they were no longer
confined?
Motion – Newton’s Laws
Case Study:
Once a captain
realizes that the ship
is dangerously close
to a land mass and is
going to collide, why
doesn’t the captain
simply TURN THE
STEERING
WHEEL?
Motion – Newton’s Laws
Case Study:
A “strong Man” attempts
to pull the aircraft shown.
In doing so, he initiates
the motion by gradually
pulling. Why doesn’t he
get a running start so he
uses his motion to create
a harder initial pull on
the plane to get it going?