2.01 Speed, velocity, and acceleration

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:

https://www.qldscienceteachers.com/junior-science/physics/worksheets/miscellaneous-speed-and-acceleration.pdf