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1. SUBMITTED BY : SURAJ S PILLAISUBMITTED BY : SURAJ S PILLAI
PHYSICAL SCIENCEPHYSICAL SCIENCE
BADHIRIYA B.Ed TRAININGBADHIRIYA B.Ed TRAINING
COLLEGECOLLEGE

2. WELCOMEWELCOME

3. Newton’sNewton’s
Laws ofLaws of
MotionMotionI.I. Law of InertiaLaw of Inertia
II.II. F=maF=ma
III.III. Action-ReactionAction-Reaction

4. Newton’s Laws of MotionNewton’s Laws of Motion
 11stst
LawLaw – An object at rest will stay at rest,– An object at rest will stay at rest,
and an object in motion will stay inand an object in motion will stay in
motion at constant velocity, unless actedmotion at constant velocity, unless acted
upon by an unbalanced force.upon by an unbalanced force.
 22ndnd
LawLaw –– Force equals mass timesForce equals mass times
acceleration.acceleration.
 33rdrd
LawLaw –– For every action there is anFor every action there is an
equal and opposite reaction.equal and opposite reaction.

5. 11stst
Law of MotionLaw of Motion
(Law of Inertia)(Law of Inertia)
An object at rest will stay atAn object at rest will stay at
rest, and an object in motionrest, and an object in motion
will stay in motion atwill stay in motion at
constant velocity, unless actedconstant velocity, unless acted
upon by an unbalanced force.upon by an unbalanced force.

6. 11stst
LawLaw
 Unless actedUnless acted
upon by anupon by an
unbalancedunbalanced
force, this golfforce, this golf
ball would sit onball would sit on
the tee forever.the tee forever.

7. Newtons’s 1Newtons’s 1stst
Law and YouLaw and You
Don’t let this be you. Wear seat belts.Don’t let this be you. Wear seat belts.
Because of inertia, objects (including you) resist changesBecause of inertia, objects (including you) resist changes
in their motion. When the car going 80 km/hour is stoppedin their motion. When the car going 80 km/hour is stopped
by the brick wall, your body keeps moving at 80 m/hour.by the brick wall, your body keeps moving at 80 m/hour.

8. 22ndnd
LawLaw

9. 22ndnd
LawLaw
The net force of an object isThe net force of an object is
equal to the product of its massequal to the product of its mass
and acceleration, or F=ma.and acceleration, or F=ma.

10. 33rdrd
LawLaw
 For every action, there is anFor every action, there is an
equal and opposite reaction.equal and opposite reaction.

11. 33rdrd
LawLaw
There are two forcesThere are two forces
resulting from thisresulting from this
interaction - a force oninteraction - a force on
the chair and a force onthe chair and a force on
your body. These twoyour body. These two
forces are calledforces are called actionaction
andand reactionreaction forces.forces.