Transcript Newton's Law of Motion

APPLICATION OF FIRST LAW OF MOTION
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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.
It is push or pull, which
either changes or tends to
change the state of rest or
of uniform motion of a
body.
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
INERTIA
In a absence of external force,
the inability of body change
it’s state by itself is called
inertia.
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.
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
APPLICATION OF SECOND LAW OF
MOTION.
 When catching a ball a cricket player lowers
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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.
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 .
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.