to

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
(No Transcript)
5
(No Transcript)
6
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.

7
FORCE

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

8
Measure of Force

• A body of mass M moving with velocity v possesses
  momentum .
• P M v
• Fd /dt (Mv)Mdv/dt(M is constant)
• FMa (ad v /dt)
• Force mass acceleration

9
INERTIA

• In a absence of external force, the inability of
  body change its state by itself is called
  inertia.

10
Galileo's Law of Inertia

• In the absence of an external force, no body can
  change on its own,
• its state of rest or the state of uniform motion
  along a state line.

11
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 its
  velocity.
• (momentum) PM v
• Mmass of the body
• vvelocity

12
(No Transcript)
13
(No Transcript)
14
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.

15
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 .

16
(No Transcript)
17
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.

18
THANK YOU