in contact
The resistance offered by air to objects moving through il
The friction acting when wheels are used to pull a heavy load
Answer the following questions in brief.
1. What is friction?
2. State three advantages of friction.
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reducing friction can be dangerous to us,
What do you mean by a streamlined shape? How is it useful?
What is the cause of friction? How can we minimise it?
What is the difference between rolling and sliding friction?
uswer the following questions in detail.
Why do we use ball bearings to reduce friction?
With the help of an activity, explain the effect of friction on the nature of surface in
contact.
ter-12 > Friction
Why is it not wise to reduce friction in every situation? Explain one situation where
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Answer: a friction is aopposte of force applied on a object
advantage of frition are we can walk on the road andwrite in our copy
steamlinedf shape are used for fish to swim in amanner
Explanation:
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