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Q:

As per Newton's law of gravitation, the force between two bodies is ________.

A) directly proportional to the product of their masses B) directly proportional to the distance between them
C) directly proportional to the product of their radius D) directly proportional to the product of forces
 
Answer & Explanation Answer: A) directly proportional to the product of their masses

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1 1041
Q:

A body in equilibrium _______.

A) can move with constant acceleration B) is always at rest
C) can move with constant velocity D) can move with variable acceleration
 
Answer & Explanation Answer: C) can move with constant velocity

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Q:

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is _________________.

A) g/4 B) g/2
C) 4g D) 2g
 
Answer & Explanation Answer: A) g/4

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0 1039
Q:

Instrument for measuring low temperatures is called

A) Diagometer B) Cryometer
C) Chromatoptometer D) Cymometer
 
Answer & Explanation Answer: D) Cymometer

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3 1038
Q:

Which one of the following takes place during a nuclear fusion?

A) a heavy nucleus bombarded by neutrons breaks up B) a heavy nucleus breaks up spontaneously
C) two light nuclei combine to form a heavy nucleus D) a light nucleus breaks up spontaneously
 
Answer & Explanation Answer: C) two light nuclei combine to form a heavy nucleus

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Q:

If a ball is thrown vertically upwards with a velocity of 40 m/s, then what will be the magnitude of its displacement after 6 s?

A) 80 m B) 40 m
C) 60 m D) 20 m
 
Answer & Explanation Answer: C) 60 m

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4 1036
Q:

Why is weightlessness experienced while orbiting the earth in space ships ?

A) Inertia B) Acceleration
C) Zero gravity D) Orbital motion
 
Answer & Explanation Answer: C) Zero gravity

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0 1029
Q:

In _____________ motion of a body its velocity varies with time.

A) uniform B) linear
C) equilibrium D) non-uniform
 
Answer & Explanation Answer: D) non-uniform

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