Which of the following shows the presence of friction?
a.cars continously roll down hills
b.things fall off on smooth surfaces
c.people stay in olace as they move
d.cars stop when the driver steps on the brakes
a.cars continously roll down hills
b.things fall off on smooth surfaces
c.people stay in olace as they move
d.cars stop when the driver steps on the brakes
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Answer:
D.
may it makes friction when they use the brakes
Or A.
It can make friction too by rolling down the hills