Question :
A) work done in rolling is more than in lifting
B) work done in lifting the stone is equal to rolling it
C) work done in both is same but the rate of doing work is less in rolling
D) work done in rolling a stone is less than in lifting it
Answer : D
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A) work done in rolling is more than in lifting
B) work done in lifting the stone is equal to rolling it
C) work done in both is same but the rate of doing work is less in rolling
D) work done in rolling a stone is less than in lifting it
Answer : D
Description :
Related Questions - 1
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
A) will overflow
B) will not rise
C) depressed
D) change its meniscus
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Radiocarbon is produced in the atmosphere as a result of
A) collision between fast neutrons and nitrogen nuclei present in the atmosphere
B) action of ultraviolet light from the sun on atmospheric oxygen
C) action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D) lightning discharge in atmosphere
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The absorption of ink by blotting paper involves
A) viscosity of ink
B) capillary action phenomenon
C) diffusion of ink through the blotting
D) siphon action
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Magnetism at the centre of a bar magnet is
A) minimum
B) maximum
C) zero
D) minimum or maximum
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Metals are good conductors of electricity because
A) they contain free electrons
B) the atoms are lightly packed
C) they have high melting point
D) All of the above