Friction and Universal Law of Gravity

Front

Rough surfaces have _________ compared to smoother surfaces.

Back

greater friction

Front

Without friction, an object in motion would never stop. (True/False)

Back

True

Front

Complete the following statement: The farther away two planets are the _______ the gravitational force between them.

Back

less

Front

Newton's law of universal gravitation states that ______ and _______ are the two variables that affect the strength of the gravitational pull between two objects.

Back

Mass and Distance

Front

In which example is the gravitational force of attraction between the two objects the greatest?

Back

Example 2

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

What are the two main types of friction?

Back

Static friction and kinetic friction.

Front

What is static friction?

Back

Static friction is the friction that exists between a stationary object and the surface it's on.

Front

What is kinetic friction?

Back

Kinetic friction is the friction that occurs when two objects are sliding against each other.

Front

How does mass affect gravitational force?

Back

The greater the mass of an object, the stronger the gravitational force it exerts.