chp 3 newton's 1st law of motion flashcardizz review

Front

Who was one of the first scientists to recognize that no force is needed to keep an object in motion?

Back

Galileo

Front

What is the amount of matter in an object called?

Back

Mass

Front

What is the SI unit for force?

Back

Newton

Front

Did Copernicus believe that Earth was at the center of the universe?

Back

False

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

How does mass relate to inertia?

Back

The more mass an object has, the greater its inertia.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What does it mean for an object to be in motion?

Back

An object is in motion if its position changes relative to a reference point.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a net force?

Back

The net force is the vector sum of all the forces acting on an object.