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Lakhmir Singh Solutions Class 8 Science Solutions for Exercise in Chapter 11 - Force and Pressure
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a) Define the frictional force.
b) Explain why the frictional force is said to be a contact force.
Answer:
a) The frictional force is defined as the force that is generated between the surfaces that slide against each other.
b) The frictional force is said to be a contact force because frictional force occurs when two surfaces come in touch with each other. Example of frictional force is walking on the road. For frictional force to act, there should be a contact between the foot and the road. Therefore, it is known as a contact force.
Video transcript
"hey kids welcome to lido q a video
i am vineeth your little tutor glad to
bring you this question on your screen
define the frictional force
this is very simple
the frictional force
so frictional force is defined
as the force that is generated between
that is
generated between the surfaces that
slide against each other
between surfaces
that slide against
each other
part b explain why the frictional force
is said to be a
contact force so the frictional force
is said to be a contact force
frictional force
is set
to be a contact force because frictional
force occurs
when two surfaces come in touch with
each other
because
frictional force
occurs
when two surfaces come in touch with
each other
if you still have a doubt a comment
below
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bye kids keep learning keep flourishing"
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