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Speed, Velocity, and Acceleration For kids|PhysicsThe simplest way to explain what is speed, Velocity, and Acceleration.Lots of examples to understand In a b...
Kids learn about speed and velocity in the science of physics and the laws of motion including units and measurement. What is the difference between speed and velocity?
Velocity refers to both the speed of an object and the direction of its motion. A velocity value should have both speed units and direction units such as: m/sec north ; km/h south; cm/s left; km/min down
Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt. Created by Sal Khan. Questions.
Rate of change in position, or speed, is equal to distance traveled divided by time. To solve for time, divide the distance traveled by the rate. For example, if Cole drives his car 45 km per hour and travels a total of 225 km, then he traveled for 225/45 = 5 hours. Created by Sal Khan. Questions.
The video lesson answers the following questions: What is speed, instantaneous speed, and average speed? What is velocity and how is it related to speed? How are average speed and average velocity calculated? How can a multi-leg motion be analyzed in terms of average speed and average velocity?
Scientists "limit" the amount of time they do the measurement. When the "limit" moves to zero, that limit is one tiny moment in time. A physicist would measure your velocity as the "limit for a period of time", zero, to get the instantaneous velocity.
