Physics
Which among the following is false about displacement?

It is always positive
Displacement is never greater than Distance
It can be positive, negative or zero
Its SI unit is meter

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Physics
It is easier to roll a barrel full of coal tar than to pull it because

coal tar is a liquid and it flows in the barrel when it is rolled
the rolling friction is much less than the sliding friction
the full weight of the barrel comes into play when it is pulled
more surface area of the barrel is in contact with the road when it is pulled

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