Friction - Good or Bad?
Friction can be good.
When we walk we push backwards against the ground,
the opposing
force pushes us forwards.
Without friction our feet
would slip and walking would be impossible.
It has been shown previously that a
car is moved forwards
by the wheels which try to
turn and push
against the road.
The direction of the forces are the same
as above for a man walking.
Without friction a car could
not move
forwards,
a moving car could not be steered or
stopped.
There are many examples where
friction is a necessary force
in the world in which we live.
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