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- 1. Brain International School H-block Vikas puri New Delhi Topic- Laws of Motion Submitted by – G urunjit Submitted to – Mr .Prashant
- 2. Newton’s Contributions      Calculus Light is composed of rainbow colors Reflecting Telescope Laws of Motion Theory of Gravitation
- 3. Newton’s First Law (law of inertia) An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force.
- 4. Balanced Force Equal forces in opposite directions produce no motion
- 5. Unbalanced Forces Unequal opposing forces produce an unbalanced force causing motion
- 6. If objects in motion tend to stay in motion, why don’t moving objects keep moving forever? Things don’t keep moving forever because there’s almost always an unbalanced force acting upon them. A book sliding across a table slows down and stops because of the force of friction. If you throw a ball upwards it will eventually slow down and fall because of the force of gravity.
- 7. Newton’s First Law (law of inertia)   MASS is the measure of the amount of matter in an object. It is measured in Kilograms
- 8. Newton’s First Law (law of inertia)   INERTIA is a property of an object that describes how ______________________ the much it will resist change to motion of the object more _____ means more inertia ____ mass
- 9. st 1 Law  Unless acted upon by an unbalanced force, this golf ball would sit on the tee forever.
- 10. Inertia
- 11. Terminal Velocity
- 12. Newton’s Second Law Force equals mass times acceleration. F = ma
- 13. Newton’s Second Law Force = Mass x Acceleration  Force is measured in Newtons ACCELERATION of GRAVITY(Earth) = 9.8 m/ 2 s  W eight (force) = mass x gravity (Earth)  Moon’s gravity is 1/6 of the Earth’s If you weigh 420 Newtons on earth, what will you weigh on the Moon? 70 Newtons If your mass is 41.5Kg on Earth what is your mass on the Moon?
- 14. Newton’s Second Law   WEIGHT is a measure of the force of gravity on the mass of an object measured in __________ Newtons
- 15. Newton’s Third Law For every action there is an equal and opposite reaction.
- 16. rd Newton’s 3 Law  For every action there is an equal and opposite reaction. Book to earth Table to book
- 17. Think about it . . . What happens if you are standing on a skateboard or a slippery floor and push against a wall? You slide in the opposite direction (away from the wall), because you pushed on the wall but the wall pushed back on you with equal and opposite force. Why does it hurt so much when you stub your toe? When your toe exerts a force on a rock, the rock exerts an equal force back on your toe. The harder you hit your toe against it, the more force the rock exerts back on your toe (and the more your toe hurts).
- 18. Newton’s Third Law  The force would be the same.  Force (bug)= m x A  Force (bus)= M x a Think I look bad? You should see the other guy!
- 19. Review Newton’s First Objects in motion tend to stay in motion and Law: objects at rest tend to stay at rest unless acted upon by an unbalanced force. Newton’s Second Law: Force equals mass times acceleration (F = ma). Newton’s Third Law: For every action there is an equal and opposite reaction.
- 20. 1stlaw: Homer is large and has much mass, therefore he has much inertia. Friction and gravity oppose his motion. 2nd law: Homer’s mass x 9.8 m/s/s equals his weight, which is a force. 3rd law: Homer pushes against the ground and it pushes back.

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