Speed is the total
Vector Quantities are
those which have
direction. Like
second means its speed
speed=distance/time
is 100/5=20 m/s.
displacement made per
velocity
back to initial position.
unit time.
Velocity is the
displacement and
when object returns
A car covers 100m in 5
Unit is m/s
magnitude and
Displacement is zero
distance covered per
unit time. It is has
displacement made is
magnitude and
Scalar quantities are
Velocity can be zero if
zero.
direction and hence it is
those which have only
Inertia is the property
vector quantities.
magnitude. Like
by virtue of which an
distance and mass.
For example a runner
who covers 400m and
returns back to his
initial point of start has
made zero
displacement.
object will resist any
Displacement is the
change in position or
Acceleration is the rate
shortest path covered
motion.
of change of velocity.
during motion.
= change of velocity/
time Unit is m/s^-2
Definition: Any object at
rest or Uniform motion
Distance is the total
path covered during
This is also known as
will remain at its state
motion.
Law of Inertia
of rest or motion unless
an external force acts
Linear Motion
on it.
Newtons first law of
Motion
For example we tend to
fall front when a bus
stops its motion. The
Derived units are those
portion of body at
which are obtained by
motion wants to remain
combining two or more
at motion so we tend to
fundamental units like
fall front while lower
speed which has
portion comes to rest.
distance and time as
fundamental unit.
Linear Momentum is
Units are standards for
Motion (How things
measurement of
Physical Quantity
Physical Quantity
move around us?)
There are different
Newtons Laws of
The rate of change of
the product of mass and
momentum is directly
velocity. p=m x v Unit is
Newtons second law of
proportional to force
kgm/s. For Example a
motion
applied. F=∆p/∆t Unit is
ship may travel slowly
newton or N. Also
but due to greater mass
written as F=ma
its momentum will be
Motion
types of motion like
very high.
linear or circular. In
There are seven
this Unit we will
fundamental S.I units.
For example to launch a
study linear motion.
mass, time, length,
rocket we need burning
current, temperature,
intensity of light and
Every action has equal
amount of substance.
and opposite reaction
Also two more for
hot gas moving
downwards which is
called action and due to
this the rocket moves
angles knows as radian
and steradian.
up which is reaction.
Newtons third law of
motion
In balanced force net
force is zero while in
Real Life Application
We may have balanced
unbalanced the net
or unbalanced force.
force is not zero. In the
If we happen to jump
F=ma force is known as
off a slow moving
net force.
vehicle we should keep
running for some time
so that whole body
overcomes the effect of
Seat belts are used in
cars to reduce the
impact during
accidents.
these laws that frame
of reference is same.
inertia.
When we jump from a
Impact during accidents
boat we should know
are more in lighter
that due to reaction
vehicles as their inertia
boat will move
is less so they should
backwards. We should
drive very carefully.
be careful!
In Tug of war also we
In sports when we
try to pull from
finish running we have
opposite sides. If force
to keep running for
is unbalanced then the
some more distance or
team with less force is
else we will have
pulled towards team
tendency to fall front.
with greater force.
There is a limitation to
This means if I throw a
ball inside bus then I
feel see different
motion than a person
standing outside the
bus.