Answers

2015-11-28T16:34:00+05:30
Reduce the friction of the surface on which it is kept , you have to apply less force & it will move very easily ,
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2015-11-29T18:24:05+05:30
We have to apply rollers for it so that we can move a heavy box easily
one reason is round objects have always less contact friction,so as the friction is less static friction comes into play which helps us to move a heavy box easily;just like a heavy man who is 399kgs slides easily on the floor
HOPE IT MIGHT HELP YOU
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