Presentation Transcript

1. Newton’s Laws of Motion.

   By: Natalie Hamilton. November 11, 2010. Mrs. Davis. 2nd period.
2. Newton’s First Law. An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
3. First Law Examples. In other words, Newton’s first law explains that any object stays still until a force acts upon it. For example, a ball will stay still on the floor. But if someone pushes it, a force was acted on the ball, causing it to move.
4. Newton’s Second Law. The second law of motion determines the effect of net force on a body. The first law only defines the natural state of the motion of a body, when net force on the body is zero. It does not provide us with any tool to quantitatively relate force and acceleration .
5. Second Law Examples. Consider a crate being pulled along a horizontal, frictionless floor. A rope is tied around it and a man pulls on the rope with a force of T. T is the tension in the rope.
6. Newton’s Third Law. For every action there is an equal and opposite reaction.
7. Third Law Examples. For every action there isan opposite reaction, which means if to people are up against each other applying force, there is an equal reaction, sometimes opposite.
8. Inertia! Inertia- the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force. The idea of inertia is quite simple. Inertia is the principle that an object will tend to keep moving at a constant speed and in one constant direction unless something else acts to change it
9. The End.