Lakhmir Singh Solutions Class 9 Physics Solutions for Exercise in Chapter 3 - Gravitation
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a) Define the mass of a body. What is the SI unit of mass?
b) Define the weight of a body. What is the SI unit of weight?
c) What is the relation between the mass and weight of a body?
Answer:
a) The mass of the body is defined as the quantity of matter that is contained in it. The SI unit of mass is kg.
b) The weight of the body is defined as the force with which the body gets attracted towards the centre of the earth. The SI unit is N.
c) The relation between mass and weight of a body is W = mg
Video transcript
"hey guys welcome to lido q a video
i am vinit your leader tutor bringing
you this question on your
screen the question is
define mass of a body right
what is the si unit of mass define the
weight of a body
what is the si unit of weight what is
the relation between the mass and weight
of a body
okay now let's define each one of them
right so first we are going to
define mass so number
a
mass of a body
so mass of a body is defined
as the quantity of matter
contained in it
right the si unit
of mass is
we all know this kg right
now for weight
weight is a term that we generally use
synonymously for mass right
but weight and mass are quite different
we all know that right so
let us define weight
weight of
a body is a force
with which it is
attracted towards
the center of the earth
right the si unit of weight is
newton
and
what is the relationship between
weight and mass right the relationship
is that
weight
weight is
directly proportional
to mass and is
given by w is equal to
product of mass into force due to
gravity
acceleration due to gravity so this is
it guys
if you still have a doubt please leave a
comment below
do like the video and subscribe to our
channel i'll see you in our next video
until then bye guys keep learning"
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