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Smitha

Jun 4, 2014

#### what are the advantage and disadvantage of friction?



Friction plays a vital role in our daily life. Without friction we are handicap.

1. It is becomes difficult to walk on a slippery road due to low friction. When we move...

Letusknowwhy

Apr 8, 2014

#### Give examples to show that friction is both a friend and a foe.



Examples of friction as a friend:
1. We can walk due to frictional forces between ground and our feet.
2. We can  write on board or paper because of friction between the chal...

Astha Mishra Mishra

Mar 9, 2015

####  Explain, why rolling friction is less than sliding friction?



as area of contact is less in the case of rolling than in tha case of sliding

Shreenidhi C

Jul 9, 2014

#### Why  do the cutting tools have sharp edges?



Why does the cutting edge of a knife made sharp?

Answer:  The cutting edges of tools like blades, knives etc., are provided with sharp edges to cut th...

Sanjeev Tiwari

Jul 9, 2015

#### Give two examples showing the harmful effects of friction.



Ans:
1. Opposes motion of a body hence more energy is needed to overcome the friction.
2. Producing the heart in moving parts of machines leads to wastage of energy.
3. For...

Sanjay Kumar

Sep 28, 2013

#### what is the difference between sliding and static friction?For a given pair of objects,which of the two is greater?



Static friction:
Static friction is the friction which comes into play when surfaces of the objects are at rest relative to each other even there is an...

Punmaram

Nov 14, 2013

#### why is it difficult to walk on a smooth or wet floor



Friction plays an important role while walking on any surface. On the wet surface the friction is very low than the normal walking surface as layer of water makes the floor smooth....

Arunabha Biswas

Jul 20, 2015

#### why the shape of an aeeroplane or a ship is streamlined?



The aeroplanes and ships have streamlined shaped bodies because they travel in fluids.  Fluids(either liquid or gas) exerts a force opposite to the direction of motion when an...

SUPRAJA HARINARAYANA

Feb 22, 2014

#### what is streamlined shape and give one example



The special shape that is given to the object that can move in a fluid is called streamlined shape. The objects while moving in the fluid experience a certain force which is opposi...

Gautami rawat

Jul 3, 2013

#### what will be the causes if friction vanishes?



we would not be able to do anything as there will be no grip

Smitha

Jun 4, 2014

#### what are the advantage and disadvantage of friction?



Friction plays a vital role in our daily life. Without friction we are handicap.

1. It is becomes difficult to walk on a slippery road due to low friction. When we move...

Letusknowwhy

Apr 8, 2014

#### Give examples to show that friction is both a friend and a foe.



Examples of friction as a friend:
1. We can walk due to frictional forces between ground and our feet.
2. We can  write on board or paper because of friction between the chal...

Astha Mishra Mishra

Mar 9, 2015

####  Explain, why rolling friction is less than sliding friction?



as area of contact is less in the case of rolling than in tha case of sliding

Shreenidhi C

Jul 9, 2014

#### Why  do the cutting tools have sharp edges?



Why does the cutting edge of a knife made sharp?

Answer:  The cutting edges of tools like blades, knives etc., are provided with sharp edges to cut th...

Sanjeev Tiwari

Jul 9, 2015

#### Give two examples showing the harmful effects of friction.



Ans:
1. Opposes motion of a body hence more energy is needed to overcome the friction.
2. Producing the heart in moving parts of machines leads to wastage of energy.
3. For...

Sanjay Kumar

Sep 28, 2013

#### what is the difference between sliding and static friction?For a given pair of objects,which of the two is greater?



Static friction:
Static friction is the friction which comes into play when surfaces of the objects are at rest relative to each other even there is an...

Punmaram

Nov 14, 2013

#### why is it difficult to walk on a smooth or wet floor



Friction plays an important role while walking on any surface. On the wet surface the friction is very low than the normal walking surface as layer of water makes the floor smooth....

Arunabha Biswas

Jul 20, 2015

#### why the shape of an aeeroplane or a ship is streamlined?



The aeroplanes and ships have streamlined shaped bodies because they travel in fluids.  Fluids(either liquid or gas) exerts a force opposite to the direction of motion when an...

SUPRAJA HARINARAYANA

Feb 22, 2014

#### what is streamlined shape and give one example



The special shape that is given to the object that can move in a fluid is called streamlined shape. The objects while moving in the fluid experience a certain force which is opposi...

Gautami rawat

Jul 3, 2013

#### what will be the causes if friction vanishes?



we would not be able to do anything as there will be no grip

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