newton's law of motion


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newton's law of motion

  1. 1. -Law of Inertia -Law of acceleration-Action/ Reaction
  2. 2.  The law of Motion is formulated by Sir Isaac Newton thus got the name of Newton’s Law of Motion. There are physical three laws which are considered the basis for classical mechanics. The law of motions describes the relationship of force acting on body and the force which gave of the motion. Newtons laws are applied to physical objects which are considered or idealized as a particle, in the sense that the extent of the body is neglected in the evaluation of its motion. In the given interpretation mass, acceleration, momentum, and the most important part “force” are assumed to be externally defined quantities
  3. 3. Newton’s first law of Motion (Inertia):An object at rest stays at rest, unless an external, unbalance force acts on it. Newtons first law of motion applies to both objects in motion and objects at rest. Objects in motion have inertia because they want to remain in motion. For example a roller coaster has inertia. When it starts a drop it wants to continue moving in the same direction at a constant speed. It doesnt however because the tracks act as an outside force and change the roller coaster cars direction.
  4. 4. -Newton’s first law states that the speed of an object inuniform in motion will remain constant unless there’s an external force applied to it. -An object at rest will remain at rest if there is no external force applied to it. -The first law of motion is also called Law of Inertia
  5. 5. (Inertia)  Newtons first law applies to object at rest as well. An object at rest has inertia because it wants to stay at rest. The more mass the object has the greater the tendency that it will remain at rest when another force acts on it. In the picture the car is in a state of rest, and until another force great enough to move it acts upon it, it will remain at rest.
  6. 6. Second law of motion (acceleration)~Newtons second law of motion pertains to the behavior of objects for which all existing forces are not balanced. ~The second law states that the acceleration of an object isdependent upon two variables - the net force acting upon the object and the mass of the object. 
  7. 7. What does it mean?Everyoneunconsciouslyknows the secondlaw. Everyoneknows theheavier objectsrequire moreforce to move thesame distance aslighter objects
  8. 8. However, the Second Law gives us an exact relationship between force, mass, and acceleration. It can be expressed as a mathematical equation: F=MA FORCE= MASS * ACCELERATIONS
  9. 9. For every action there is anequal and opposite re-action. What does it means?
  10. 10. This means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say thatwhenever an object pushes another object it gets pushed back in the opposite direction equally hard.
  11. 11. Lets study how a rocket works to understand Newtons Third Law.The rockets action is to push down on the ground with the forceof its powerful engines, and the reaction is that the groundpushes the rocket upwards with an equal force.