describe two examples from your daily life to demonstrate to following.1 friction in desirable 2 friction is undesirable
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friction is desirable as we are able to keep something on a table...if it was not for friction the things would slip off of the table and friction is undesirable because machine parts get heated and in this way energy is wasted in the form of heat
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DISERABLE:
walking on ground ,
it's friction between our feet and ground that enables us to walk.
For rolling,
The friction between the tyres and road is necessary for vehicles to move safely
UNDESIRABLE:
FRICTION CONSUMES A Large part of energy available to us.as friction opposes the relative motion between two objects in contact.
A SIGNIFICANT AMOUNT OF ENERGY,supplied to machines ,gets wasted in form of heat energy
walking on ground ,
it's friction between our feet and ground that enables us to walk.
For rolling,
The friction between the tyres and road is necessary for vehicles to move safely
UNDESIRABLE:
FRICTION CONSUMES A Large part of energy available to us.as friction opposes the relative motion between two objects in contact.
A SIGNIFICANT AMOUNT OF ENERGY,supplied to machines ,gets wasted in form of heat energy
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