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Newton's Second Law of Motion

The acceleration of an object produced by a force is directly proportional to the amount of force, and inversely proportional to the mass of the object.
 
So with the same mass, more force means more acceleration.
 
But with the same force, more mass means less acceleration.
 
Remember that acceleration is the rate of change of velocity, and that velocity has both magnitude (speed) and direction.
 
Check out the video below for some examples of Newton's Second Law in real life.
The harder you kick the ball, the faster it will move.
With the same amount of force applied, a full shopping cart moves slower because it has more mass which makes it heavier.
Remember the formula:
 
Force = Mass x Acceleration 
These are SI units. Remember to convert them if the units are different during calculations!
An example using the formula
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