Friction is
A. O foe
B. friend
C. o both (a) and (b)
D. O none of these
Answers
Answer:
B. Friend.
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Friction is
A. foe
B. friend
C. both (a) and (b)
D. none of these
Friction is both a friend and a foe. This can be shown in the following below cases:-
Friction is a friend because:
1. It allows us to walk wihtout slipping on ground.
2. It allows us to have a grip and catch different objects.
3. We can use transportation because of friction.
4. Speeds of moving objects can be controlled using friction.
Friction is a foe because :
1. It causes wear and tear in objects.
2. It causes wind and water erosion.
3. Moving heavy objects consumes more energy because additional energy is required to move the object against the direction of friction.
4. All moving parts of machines need lubrication for proper functioning.