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NCERT Solutions Class 8 Science Solutions for Exercise in Chapter 12 - Friction
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A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface (a) covered with silk cloth (b) covered with a layer of sand and (c) covered with a glass sheet. On which surface will the marble move the shortest distance. Give a reason for your answer.
Answer:
marble move the shortest distance on the floor covered with sand as it offers maximum friction against its motion.
Video transcript
"hi kids welcome to lido q a video
i am vinit your lido tutor glad to bring
you this question on your screen
a marble is allowed to roll down an
inclined plane from a fixed height
at the foot of the inclined plane it
moves on a horizontal surface
covered with silk cloth covered with a
layer of sand
and covered with a glass on which
surface will the marble
move the shortest distance give a reason
for your answer
the marble will
move
the shortest distance
when covered with a
layer of sand
because
sand produces
friction
which opposes the motion of the marble
isn't that easy 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 kids
keep learning keep flourishing
"
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