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NCERT Solutions Class 8 Science Solutions for Exercise in Chapter 12 - Friction
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A father and son pushed their car to bring it to the side of road as it had stalled in the middle of the road. They experienced that although they had to push with all their might initially to move the car, the push required to keep the car rolling was smaller, once the car started rolling. Explain.
Answer:
Because initially they had to apply force to set the card in motion but once the car started rolling, they had to apply force only to balance rolling friction of the car, the value of which is very less.
Video transcript
"hey kids welcome to lido q a video
i am vinit your leto tutor glad to bring
you this question on your screen
a father and son pushed their car to
bring it to the side of
a road as it had stalled in the middle
of the road
they experienced that although they had
to push with all their might
initially to move the car the push
required to keep the car rolling was
smaller
once the car started rolling explain
initially
they had
to apply
force to set the car
in motion
but once the car
started moving
they had to apply
force to balance the rolling friction of
the car
rolling friction
of the car
which is very small
very small hence
the observation 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 practicing
"
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