Friction and Gravity

Vocabulary flashcards covering the definitions, examples, and key factors of friction and gravity based on the lecture notes.

Friction

The force that two surfaces exert on each other when they rub against each other.

Factors affecting friction

The types of surfaces and how hard the surfaces are pushed together.

Sliding friction

Friction that occurs when two solid surfaces slide over each other (for example, a penguin sliding down an icy hill).

Static friction

Friction that acts between objects that are not moving (for example, a koala on a tree).

Fluid friction

Friction that occurs when a solid moves through a fluid (for example, a whale moving through the ocean).

Rolling friction

Friction that occurs when an object rolls across a surface (for example, an apple rolling down a hill).

Gravity

The force that pulls objects towards each other.

Factors affecting gravitational attraction

Mass and distance.

Mass

The amount of matter in an object.

Weight

The measure of the force of gravity.

Distance

The length between 2 points.