Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in both is same but the rate of doing work is less in rolling.
Work done in lifting the stone is equal to rolling it.
Work done in rolling a stone is less than in lifting it.
Work done in rolling is more than in lifting.

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Physics
It is dangerous to observe Solar eclipse with naked eyes because

Cosmic rays reach eyes more during the eclipse
Infrared radiations from sun burn our retina
Ultraviolet radiations from Sun burn our retina
All radiations from sun initiate chemical reactions in eyes

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