Units are measurements given to a specific dimension. For example:
t=time
M=mass
Units are used to quantify the measurement of a specific system such as acceleration, velocity, etc...
2 examples:
9.81m/s^2 is a measurement of acceleration. The unit is m/s^2 (meters per second squared) This unit is actually a constant and it measures the acceleration due to gravity. Now obviously, the number can change.
6J is a measurement of work. J (joules) shows how much work must be done on an object to complete whatever must be done on this object. For example, we need 3j of work to move this box north.
Hope this helps
