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
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
Related Questions - 2
out of the following, which is not emitted by radioactive substance?
A) Electrons
B) Electromagnetic radiations
C) Alpha particles
D) Neutrons
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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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Rectifiers are used to convert
A) Direct current to Alternating current
B) Alternating current to Direct current
C) high voltage to low voltage
D) low voltage to high voltage