Speed and Energy

Front

Speed

Back

Comes from the Old English word spedum, meaning 'quickness of motion'. How fast an object’s position changes over time.

Front

Energy

Back

Comes from the Greek word ergon, meaning 'active, working'. Energy is the ability to do work and is associated with activity.

Front

Kinetic Energy

Back

From the Greek word kinein, meaning 'to move'. Objects that are moving have kinetic energy, which is also described as energy of motion.

Front

Potential Energy

Back

From the Latin word potens, meaning 'able'. Potential energy is energy that is not doing work but is able to do so, also described as stored energy.

Front

Acceleration

Back

Comes from the Latin word acceleratus, meaning 'swift'. It occurs when a moving object speeds up, slows down, or changes direction.

Front

Motion

Back

Comes from the Latin word motionem, meaning 'a moving, an emotion'. Motion refers to movement or the state of being in motion.

Front

Force

Back

Comes from the Latin word fortis, meaning 'strong'. Force is a push or pull.

Front

Gravity

Back

The force that pulls objects or people down to Earth.

Front

Distance

Back

How far something travels.

Front

Time

Back

How long something takes.