The soles of the footwear have …………… to increase friction.
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The soles of the footwear have grooved designs to increase friction.
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Write three advantages of friction.
Why do we need to increase friction?
When the body has …………… shape, the friction is minimum.
Observe the given image and answer the following questions.
(a) Is this a method of increasing or decreasing friction?
(b) What are the disadvantages of friction?
