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Speed is defined as the distance travelled per unit time.
The formula for speed is v=ts, where v is speed, s is distance, and t is time.
Average speed is calculated by dividing the total distance travelled by the total time taken.
If a car travels 500 meters in 20 seconds, its speed is 20 m/s.
Speed and velocity are always the same.
A cyclist with an average speed of 5.0 m/s for 2.0 minutes travels 600 meters.
Velocity can have a negative sign to indicate direction.
The formula for acceleration is a=Δv / Δt.
Acceleration is defined as the change in speed per unit time.
If a car\’s speed changes from 25 m/s to 15 m/s in 2 seconds, its acceleration is 10 m/s².
The area under a speed-time graph represents distance travelled.
For an object with constant speed, the speed-time graph is a straight line parallel to the time axis.
If the acceleration of an object is 0.5 m/s², its speed increases by 0.5 m/s every second.
A speed-time graph with a straight line of positive gradient indicates constant acceleration.
An object at rest has a speed-time graph as a vertical line.