Investigating Force and Motion

 

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Conclusion

The Laws of Motion, discovered by Sir Issac Newton, more than two hundred years ago, are applicable universally to all objects in motion even today:

Newton's First Law explains the phenomena that if a car crashes at a high speed, passengers continue to move at that speed. Safety belts and airbags prevent them from being ejected from the car. Similarly, a bowling ball moving in a straight line continues to keep going along at the same rate until it hits something.

Source: Poster neoscience

Newton's Second Law (see figure below) is applied to a baseball and bowling ball being pushed with the same force. Since the bowling ball has three times more mass than a baseball, it accelerates at one third the rate of the baseball. Thus proving that F = ma.


Source: Poster neoscience

Newton's Third Law (see figure below) is demonstrated at lift-off, of a space shuttle. The space shuttle pushes the exhaust gases downward toward the earth, while at the same time and with equal force, the gases push the shuttle upward.

When a soccer player kicks a soccer ball, the applies an equal and opposite force back on the player's foot. Similarly, the baseball bat exerts a force on the ball at the same time the ball exerts a force on the bat.

Source: Poster neoscience

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