Physics: Chapter 4- Newton's First Law of Motion-Inertia

how much does one kilogram weigh?

9.8 Newtons

What was Coopernicus' theory of the moving Earth?

Earth and other planets move around the sun

Newton's first law

Every object continues in a state of rest, or of motion in a straight line at constant speed, unless it is compelled to change that state by forces exerted upon it.

Galileo argued that when _______ is present, a force needed to keep an object moving

Friction

What is mass only measured in?

Kilograms

What notion did Galileo demolish?

That a force is necessary to keep an object moving

Net force

The combination of all forces acting on an object

What is Newton's first law also known as?

The law of inertia

Equilibrium

When an object is at rest, with the net force equaling zero

volume

a measure of space and is measured in units such as cubic centimeters, cubic meters, and liters

Force

any push or pull

normal force

for an object resting on a horizontal surface, the upward force that balances the weight of the object (aka the support force)

support force

force that completely balances the weight of an object at rest

violent motion

imposed motion... result of forces that pushed or pulled

Friction

is the name given to the force that acts between materials that touch as they move past each other

What did Aristotle study and what two types of ______ did he divide them into?

motion natural motion and violent motion

Natural motion

straight up or straight down

Weight

the force of gravity on an object

How is friction caused?

the irregularities in the surfaces of objects that are touching

What is the SI unit of force?

the newton

mass

the quantity of matter in an object. More specifically, mass is a measure of the inertia, or "laziness," that an object exhibits in response to any effort made to start it, stop it, or otherwise change its state of motion.

inertia

the reluctant of any body to change its state of motto. Mass is the measure of inertia

The equation for weight

weight= mass x acceleration due to gravity, or simply, weight= mg