Newton's First Law of Motion: Inertia

Aristotle

________ based his theories on what he observed in nature around him, and thus came to the conclusion that motion always required a medium to resist it, like air or water.

Galileo

________ dropped objects of different weights from the top of the Leaning Tower of Pisa and compared their falls.

Copernicus

________ put forth the concept of a moving earth in the 16th century, but it sparked a lot of argument, as:

Symbol

________ stands for "vector sum of, "F stands for "forces.

dynamic equilibrium

For any object in static or ________, the sum of forces acting on it is always zero.

Tension

________ → the stretching force causing the string to stretch.

crate

A(n) ________ being pushed across a factory floor is in dynamic equilibrium.

muscular effort

Forces can be gravitational, electrical, magnetic, or ________.

Violent motion

________ is a result of pushing or pulling forces.

uniform speed

Every object continues to remain in a state of rest or of ________ in a straight line, until it is acted upon by a nonzero net force.

constant speed

An object moving at a(n) ________ in a straight line is another form of equilibrium.

vertical movement

He (Aristotle) saw ________ as natural, horizontal movement as unnatural and requiring a sustaining force.

Scalar quantity

________ → a quantity defined only by its magnitude.

puff of smoke

A(n) ________ is made of air and will rise to the air.

Natural motion

________ occurs due to the nature of the object and depends on the elements it contains (fire, air, water, earth)

Vector

________ → an arrow drawn to represent a force, the length and direction of these arrows are drawn to scale.

equilibrium

When you are in ________, your weight is equal to the force of gravity acting on you.

downward sloping

If a ball was released from rest from the top of a(n) ________ plane, it would rise to almost the same height again on the opposite upward sloping plane.

State of rest

________: whipping a tablecloth out from under the dishes on the tabletop, without actually disturbing the dishes.

external force

An object in its proper place doesnt move unless subjected to a(n) ________.

lump of clay

A feather is a mixture of earth and air and will fall to the ground when unsupported, but not as fast as the ________.

Pounds

________ and newtons are units of weight, which are units of force.

Vector quantity

________ → a quantity thats defined by both magnitude and direction.

Circular motion

________ has no start or end; it keeps repeating.

→ Inertia

________: The tendency of objects to resist changes in motion.

Natural motion

________ is either straight up or straight down for objects on earth, and circular for celestial bodies.

Dynamic Equilibrium

________ → when the object is moving at a constant speed in a straight line path.

Difficulties in the concept of violent motion

forces causing the pushes and pulls werent always obvious

[Aristotles reasoning behind the arrow continuing to move

Parting of air by the moving arrow resulted in a squeezing effect at the end of the air, causing the air to rush back and prevent a vacuum from forming

Quick Summary

Motions of objects are due to either

→ Inertia

The tendency of objects to resist changes in motion

keyword

continue

state of rest

whipping a tablecloth out from under the dishes on the tabletop, without actually disturbing the dishes

state of motion

space probes moving constantly in outer space

e.g

two people pulling an object in the same direction with the same amount of force each doubles the force acting on the object

e.g

force, velocity, acceleration

e.g

mass, volume, speed

(How to implement it

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