Question :
A) sand is soft and concreter is hard
B) the friction between sand and feet is less than that between concrete and feet
C) the friction between sand and feet is more than that between concrete and feet
D) the sand is grainy but concrete is smooth
Answer : B
It is more difficult to walk on a sandy road than on a concrete road because
A) sand is soft and concreter is hard
B) the friction between sand and feet is less than that between concrete and feet
C) the friction between sand and feet is more than that between concrete and feet
D) the sand is grainy but concrete is smooth
Answer : B
Description :
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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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Stars appears to move from east to west because
A) all stars move from east to west
B) the earth rotates from west to east
C) the earth rotates from east to west
D) the background of the stars moves from west to east
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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
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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
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A) minimum
B) maximum
C) zero
D) minimum or maximum