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| This picture shows Newton's second law. It shows an object being pushed by a force. |
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---Newton’s second law states that the net force is proportional to the time of change, and inversely proportional to the mass of the object. The acceleration of an object is due to the net force that is acting on that object. If the forces are balanced
then there is no acceleration, but if forces are unbalanced then there is acceleration. The acceleration made by a net force on any given object is proportional to the magnitude of the net force. It is inversely proportional to the mass of any given object. If you
double the net force then the acceleration also doubles, and if the mass is doubled then the acceleration will be half of what it was. It is very important to know all about net force. Acceleration is proportional to net force; mass times acceleration equals net
force; the acceleration always goes the same way as the net force; acceleration is made by a net force. Newton’s second law is most often used as the equation f=ma.
---There are many different examples that could be used to describe Newton’s second law. When a baseball player hits a baseball, they are accelerating it to a high velocity. If the ball had a greater mass, the same amount of force would not result in as high of a velocity. Another example would be if you threw a football; when you throw the football you are applying a force and accelerating the ball. As soon as the ball leaves your hands gravity is pushing down on it, acting as a force. This force of gravity accelerates the ball downwards. A last example would be when you are driving a car. When you hit the gas it immediately applies a force to the road due to friction. The brakes put a force on the wheels and slow down the car. The steering wheel, gas pedal, and the brakes are all examples of accelerators. The gas pedal and the brakes make the car speed up or slow down, so they are accelerators, and the steering wheel changes the direction (velocity) of the car, which also makes the steering wheel an accelerator. |