Mechanics is an old world for the branch of science that deals with the motion
of material objects. We have to understand the distinction between three different terms: speed, velocity, and acceleration. |
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Speed
s = d / t |
Velocity
|
Acceleration measures the rate of change of velocity, and the velocity, acceleration has a direction. You are accelerating if you are speeding up, slowing down, or change direction. |
Acceleration
is the amount of change in velocity devided by the
time it takes the change to occur. |
For objects falling, we observe: The velocity of a falling object is proportional to the length of time that it has been falling. v = g*t |
The constant is the numerical value for the acceleration we and all other objects experience at the Earth's surface. |
Tutorial:Unit Conversion for Combined Units |
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