Answers

2014-11-27T21:34:21+05:30
two examples of friction....
 useful in daily life
1) we are walking because of friction of the ground if there is no friction between our feet and the ground...we will tend to slip and fall down

2) we are able to write because of friction 

being a problem in daily life
1) forest fire is the biggest problem of friction 

2) many road accidents happen due to friction

hope it helps u :D
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2014-12-02T18:23:39+05:30
Car wheels moving on the road
it results in the loss of energy leading to less efficiency of the machine

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