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welcome. to. NEWTON'S LAW OF MOTION. PHYSICS PROJECT. COMPOSED BY. SHWETA KRI. KANCHAN KRI. CLASS-XI 'A' CLASS-XI 'A' ROLL NO.-191 ROLL NO.-199. CONTENTS. 1. NEWTON'S LAW OF MOTION. 2. FIRST LAW OF MOTION. 3. ITS APPLICATION. 4. FORCE AND ITS MEASURE.

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  1. welcome to NEWTON'S LAW OF MOTION

  2. PHYSICS PROJECT COMPOSED BY SHWETA KRI. KANCHAN KRI. CLASS-XI 'A' CLASS-XI 'A' ROLL NO.-191 ROLL NO.-199

  3. CONTENTS 1. NEWTON'S LAW OF MOTION 2. FIRST LAW OF MOTION 3. ITS APPLICATION 4. FORCE AND ITS MEASURE 5. INERTIA 6. MOMENTUM 7. SECOND LAW OF MOTION 8. ITS APPLICATION 9. IMPULSE 10. THIRD LAW OF MOTION 11. ITS APPLICATION 4. FORCE AND ITS MEASURE

  4. APPLICATION OF FIRST LAW OF MOTION • When a running horse suddenly stops, the rider falls forward. • When a horse suddenly starts moving the rider falls backward. • We hated carpet with a stick to remove the dust. • Athletes run some distance, before taking a long jumps . • A man jumping form a moving train may fall down.

  5. FORCE It is push or pull, which either changes or tends to change the state of rest or of uniform motion of a body.

  6. Measure of Force A body of mass M moving with velocity v possesses momentum . P= M v F=d /dt (Mv)=M×dv/dt(M is constant) F=Ma (a=d v /dt) Force =mass × acceleration

  7. INERTIA In a absence of external force, the inability of body change it’s state by itself is called inertia.

  8. Galileo's Law of Inertia In the absence of an external force, no body can change on it’s own, it’s state of rest or the state of uniform motion along a state line.

  9. MOMENTUM (Linear ) It is defined as the total quantity of motion contained in a body and is measured as the product of the mass of the body and it’s velocity. (momentum) P=M v M=mass of the body v=velocity

  10. APPLICATION OF SECOND LAW OF MOTION. • When catching a ball a cricket player lowers his hands to save himself from getting hurt. • Cars, busses, trucks, bogies of the train, etc. are provided with a spring system to avoid server jerks. • Bogies of the train are provided with buffer to avoid server jerks during shunting of trains. • A person falling on frozen ice is likely to receive more injuries than one falling on kuchcha floor. • China wares are wrapped in straw or paper before packing.

  11. IMPULSE The forces which act on bodies for short time are called impulsive force. For Ex:- 1.In hitting a ball with a bat. 2.In firing a gun ,etc Impulse of a force is a measure of total effect of the force .

  12. APPLICATION OF THIRD LAW OF MOTION • While firing a bullet , the gun must be held tight to the shoulder. • When a man jumps from a boat to the shore, the boat slightly moves away from the shore. • When a bullet is fired from a gun, the gun recalls or gives a kick in backward direction. • Rocket works on the principle of conservation of momentum. • If some one left on a frictionless floor desire to get out of it, he can do so by blowing air out of his mouth.

  13. THANK YOU

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