You know that a large displacement in a small amount of time means a large velocity and that velocity has units of distance divided by time, such as miles per hour or kilometers per hour.

In everyday language people use the word deceleration to describe slowing down. But in physics, we use the single term acceleration to mean any change in velocity, whether it be speeding …

Newton's first law states that an object at rest or moving with a constant velocity will stay at rest or stay moving with a constant velocity as long as no force acts upon it.

You can think of speed as velocity without the direction. They both have the same units, meters per second as a standard unit, or in a more day-to-day life, unit would be miles per hour.

A bird is flying with a horizontal velocity v x = 9.3 m/s and a vertical velocity v y = 8.6 m/s. Calculate the magnitude and angle, relative to the horizontal, of the bird's total velocity. Enter …

Although speed and velocity are often words used interchangeably, in physics, they are distinct concepts. Velocity (v) is a vector quantity that measures displacement (or change in position, …

In physics, time reversal is a concept that refers to reversing the direction of time. In an inertial reference frame, time reversal can be easily understood by imagining time moving backward, …

Learn how to interpret the motion of an object represented on a velocity vs. time graph.

This equation can be derived by combining two equations for average velocity. Average velocity is defined as displacement divided by the time during which that displacement occurred:

If you're talking about how fast something is going, and you give the direction that it's going in, you're talking about velocity. If you don't give the direction you are talking about speed.