Newton's Cradle demonstrates the law of conservation of momentum through a series of balls. When one ball is pulled back and released, it strikes the next ball, transferring its momentum down the line and causing the last ball to move. This process repeats as the balls continue to exchange momentum. Rockets and jet engines also demonstrate conservation of momentum, as the high velocity exhaust ejected from the engines provides momentum that propels the engine in the opposite direction, allowing for flight. Collisions between objects also conserve total momentum, such as when squids eject water for propulsion or when players collide during a game.

2. Applications in
daily life

3. Newton’s Cradle
By pulling one ball away
from the others and
releasing it, the ball will
swing and strike the
second ball, which in
turns sends the
momentum through the
series of balls causing
the last ball to move
away from the group.
When the last ball
swings back, its
collision then
causes the first
ball to move
away.
This process
repeats until
it finally
wears down.
Pulling away
several balls will
result in the
same number of
balls moving
away at the
other end.

5. A large mass of fuel
is blasted out of the
bottom of the rocket
at a high velocity.
To conserve
momentum, the
rocket must have
equal momentum
in the opposite
direction, and so
the rocket shoots
up into the air.
As more fuel is
burnt, the mass of
the rocket
increases but the
momentum
remains more or
less constant, so
velocity increases.

7. Jet engine
The fuel used in
either a jet
or rocket
engine has
mass, as does
the rocket/jet
being
propelled.
When burned, the
fuel generates hot
exhaust gases
(which have mass)
being forced out
the back end of
the engine.
Since the gases
have low mass,
but high
velocity, they
have
momentum.
In order to
conserve
momentum in the
entire system, the
jet/rocket (which
has a high mass)
starts moving in the
opposite direction.
In addition, the
acceleration is
enhanced by the
fact that the
rocket/jet is losing
mass (the fuel
being burned).

9. Squids secrete a jet of
water(ink) from their body.
An equal and opposite
momentum is created.
The squid moves in the
opposite direction.

11. When two
players hit
each other,
they will either
bounce back
or fall based
on their
momentum.
The
momentum
is equal
before and
after
collision.

13. Thank You