we can't walk or run without what
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we cannot walk or run without leg
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We can't walk or run without the force of friction.
- We can walk or run only due to the presence of force of friction.
- When we apply force with our feet in the backward direction, then a frictional force comes into play in the forward direction.
- Due to this forward frictional force, we move forward.
- In the absence of friction, we will not be able to walk or run.
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