Describing Motion

Science

What is speed?

How fast an object moves

How do you calculate speed?

Distance ÷ time

What are common units for speed?

cm/s, m/s, km/h, mph

What does constant speed mean?

The speed does not change.

What is instantaneous speed?

Speed at one exact moment

an example of instantaneous speed.

A car’s speedometer.

What is average speed?

Total distance ÷ total time.

What does a distance-time graph show?

How quickly something moves.

What does a steeper line mean?

Faster movement

What does a shallower line mean?

Slower movement

What does a flat line mean?

The object is not moving

What is velocity?

Speed and direction

What is the difference between speed and velocity

Speed = how fast. Velocity = how fast + direction.

Can speed stay constant while velocity changes?

Yes, if the object changes direction.

⭐ SUPER IMPORTANT TO MEMORIZE⭐️

🌟Speed = how fast
🌟Velocity = how fast + direction
🌟Speed = distance ÷ time