### Learn math, science, English SAT & ACT from

high-quaility study
videos by expert teachers

##### Thank you for watching the preview.

To unlock all 5,300 videos, start your free trial.

# Average Speed

###### Matt Jones

###### Matt Jones

**M.Ed., George Washington University**

Dept. chair at a high school

Matt is currently the department chair at a high school in San Francisco. In his spare time, Matt enjoys spending time outdoors with his wife and two kids.

Speed refers to the rate at which an object travels. Unlike velocity, speed is a scalar quantity so direction does not matter. **Average speed** is calculated by dividing distance by time (e.g. miles/hour).

Okay we're going to talk about average speed, instantaneous speed is the distance that you're covering at a specific time. So 100 kilometers an hour, average speed is the total distance you're going to cover over a period of time. Okay this would be, well let's do an example, let's say we drive 150 kilometers in 2 hours stop for an hour, drive 150 kilometers in 2 more hours okay what is our average speed? Okay let's solve that, first we want to go our total distance which is 150 kilometers plus zero kilometers plus 150 kilometers over out total time 2 hours plus 1 hour plus 2 hours. So if we add up our total distance, we get 300 kilometers, our total time is 5 hours and we can simplify that, it's always good to simplify down to 60 kilometers an hour. Okay so that's an example of how you solve a problem or calculating the average speed.

Please enter your name.

Are you sure you want to delete this comment?

###### Matt Jones

M.Ed., George Washington University

Matt is very comfortable in front of the whiteboard and is able to make every topic easy for anyone to digest. His straightforward approach to teaching is very refreshing.

#### Related Topics

- Relativity in Motion 26,597 views
- Displacement 20,074 views
- Speed-Instantaneous Speed 15,232 views
- Average Velocity 18,297 views
- Instantaneous Velocity 23,268 views
- Acceleration 18,750 views
- Free Fall 19,940 views
- Graphs of Motion 22,207 views
- Vector Direction 14,288 views
- Vector Quantities - Scalar Quantities 18,753 views
- Velocity Vectors 18,508 views
- Components of Vectors 13,649 views
- Projectile Motion 23,188 views
- Linear Motion 20,901 views
- Parabolic Motion 13,524 views

## Comments (0)

Please Sign in or Sign up to add your comment.

## ·

Delete