In other words, the coach moves from position A to B to C to D. What is the coach's average speed and average velocity? In conclusion, speed and velocity are kinematic quantities that have distinctly different definitions. Speed, being a scalar quantity , is the rate at which an object covers distance.
The average speed is the distance a scalar quantity per time ratio. Speed is ignorant of direction. On the other hand, velocity is a vector quantity ; it is direction-aware. Velocity is the rate at which the position changes. The average velocity is the displacement or position change a vector quantity per time ratio. Physics Tutorial. My Cart Subscription Selection. Student Extras. We Would Like to Suggest Sometimes it isn't enough to just read about it. You have to interact with it! And that's exactly what you do when you use one of The Physics Classroom's Interactives.
We would like to suggest that you combine the reading of this page with the use of our Name That Motion Interactive. It is found in the Physics Interactive section and allows a learner to apply concepts of speed, velocity and acceleration. Next Section: Acceleration. The shortest distance measured form the initial to the final position of an object is known as the displacement.
Magnitude of the displacement is not equal to the distance traveled by an object. Magnitude of the displacement for a course of motion may be zero but the corresponding distance covered is not zero.
In short, two different physical quantities — the distance and the displacement are used to describe the overall motion of an object and to locate its final position with reference to its initial position at a given time.
Consider the example of train which moves from station A to station B and comes back from station B to station A, here distance covered by train is from station A to B and then back B to A, but the displacement is zero as train is back to initial junction.
When an object covers equal distance in equal time interval is called uniform motion, whereas when an object covers unequal distance in equal time interval is called non-uniform motion. The rate of motion of an object is to find out the distance traveled by the object in unit time is referred as speed. Speed of an object is described by its magnitude and is need not be constant. It incorporates the speed of that object as well as the difference between its starting place and its ending place.
You need to calculate the velocity of objects when determining where they might go. When they are the same value, the object has traveled in a straight line. But speed is just the starting point for many valuable concepts in physics. Yes No I need help Stopping Distance Stopping distance is the distance a vehicle travels from the point the driver should stop, to when he or she actually becomes stationary. It combines thinking distance and deceleration distance. Yes No I need help Factors that can increase stopping distance are:.
I want to know the difference between speed and motion. What would be the very simple way to express these difference particularly to a non-scientific person? If you need to reference this article in your work, you can copy-paste the following depending on your required format:.
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