2.01 Speed, velocity and acceleration
Speed / velocity
Calculation for average speed / velocity
v = velocity / speed in m/s = metres per second
x = distance in m = metre
t = time in s = seconds
For now you don't need to know the difference between speed and velocity. We consider speed and velocitybeing the same thing.
Sometimes you need to convert m/s into km/h and the other way around.
To practice with these conversions you can visit the following website: http://www.math-only-math.com/worksheet-on-conversion-of-units-of-speed.html
Acceleration
Change in speed (increase or decrease) per time taken
Formula = or
a = accelaration in m/s2
v = velocity in m/s
t = time in s
When a is a positive number, you have an increase in speed, the object is speeding up = acceleration
When a is a negative number, you have a decrease in speed, the object is slowing down = deceleration also known as retardation.
Extra practice: