Newton's Second Law of Motion

law2-1.jpg law2-2.jpg


Law #2-Acceleration is produced when a force acts on a mass. The greater the mass of the object being accelerated, the greater the amount of force needed to accelerate the object.

This law basically states that the more massive an object is, the harder it will be to move it if it is at rest, or stop it if it is in motion. Picture an empty chair. If you wanted, you could move it by gently pushing the chair with your hand. Now picture that same chair with your teacher sitting in it. You may still be able to move it, but it would take a greater force and more effort. Adding a person to the chair made it more massive, so it would be harder to move.

In the pictures above, people are trying to move vehicles. Both the blue car and the brown van are moving at the same speed, .05 m/s/s. However, the blue car weighs 1,000 kg, while the brown van weighs 2,000 kg. Since the brown van is twice as heavy as the blue car, it will take twice as much force, or energy, to move it the same speed.

Learn more about Newton's Second Law of Motion.
Watch this video about Mass and Acceleration.