Distance and Time Graphs and Basic Motion/Force

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

A flat line indicates that the object is not moving.

A steeper slope indicates a higher speed.

Acceleration is the rate of change of velocity of an object.

Gravity pulls objects towards the Earth.

A downward slope indicates that the object is returning to the starting point.

Speed = Distance / Time.

A curved line indicates that the object is accelerating or decelerating.

The unit of speed in the metric system is meters per second (m/s).

Constant speed means the speed does not change, while variable speed means the speed changes over time.