Unit 3 Lesson 2 Flashcards

Front

Newton’s Law of Universal Gravitation

Back

A law stating that every object in the universe pulls on every other object with a force called gravity. The bigger the objects or the closer they are, the stronger the pull.

Front

Gravity

Back

A force that pulls objects toward each other. On Earth, gravity pulls everything toward the ground.

Front

Gravitational Force

Back

The actual force of attraction between two objects because of their mass. Example: Earth’s gravitational force pulls on the Moon.

Front

Mass

Back

The amount of matter (stuff) in an object. Mass does not change no matter where the object is.

Front

Weight

Back

The measure of the force of gravity on an object's mass. Example: Your weight is less on the Moon because the Moon has less gravity.

Front

Newton’s Law of Inertia

Back

The principle that an object will keep doing what it’s doing (staying still or moving) unless a force acts on it.

Front

Newton’s First Law of Motion

Back

An object at rest stays at rest, and an object in motion stays in motion at the same speed and in the same direction unless acted on by a force.

Front

Orbit

Back

The curved path an object takes around another object in space, caused by gravity. Example: Earth orbits the Sun.