Science Chapter 11 Lesson 2

Newtons Law of Universal Gravitation

Newtons Law of Universal Gravitation says all planets , stars, and the Sun all exert the force of gravity

Force

A force is any push or pull on an object.                                          Example: Pushing in a chair

Momentum

Momentum measures the mass and speed of an object.

Gravity

Gravity is the force holding us dow to the ground. Different planets have different amounts of gravitational pull.

Mass

Mass is determined by how much mass an object has.

Newtons 3 Laws

Fun Gravity Fact: A skydiver feels weightless because they can't feel the upward force of the ground.

Force and Acceleration

If Force increases, then the acceleration increases ; if the mass increases, then the acceleration decreases.