If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will
A. Fall in front of him
B. Fall behind him
C. Fall into his hand
D. None of the above
Answer: Option C
Solution(By Examveda Team)
The ball is thrown in vertically upward direction and given that the train is moving up with a constant velocity. Therefore, the horizontal velocity of the train and ball are both same. And, the ball travels the same horizontal distance as that of the train. Therefore, the ball will come back into the hands of thrower.Which of the following terms is not used in the field of physics?
A. Latent heat
B. Nuclear fusion
C. Refractive index
D. Stock value
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.
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.
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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