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Q:

An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process?

A) 400 J B) 50 J
C) 40 J D) 100 J
 
Answer & Explanation Answer: A) 400 J

Explanation:
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Filed Under: Physics
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Q:

The  rank  of  Captain  of  the  Indian  Navy  is equivalent to which one of the following?

A) Captain of the Indian Army B) Group Captain in the Indian Air Force
C) Lieutenant Colonel of the Indian Army D) Wing  Commander  of  the  Indian  Air Force
 
Answer & Explanation Answer: B) Group Captain in the Indian Air Force

Explanation:

Rank  of  captain  of  Indian  Navy  is equivalent   to   Group   captain   of Indian Air Force.

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Q:

At which of the following places the 5th Global Conference on Cyber Space (GCCS) was held on November 23-24, 2017?

 

A) London B) New Delhi
C) Sanya D) Tokyo
 
Answer & Explanation Answer: B) New Delhi

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Q:

The data collected from which one of the following methods is not a primary data?

A) By direct personal interviews B) By indirect personal interviews
C) By schedules sent through enumerators D) From published thesis
 
Answer & Explanation Answer: D) From published thesis

Explanation:
Primary data is information that you collect specifically for the purpose of your research project.
An advantage of primary data is that it is specifically tailored to your research needs. A disadvantage is that it is expensive to obtain.
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Q:

A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is

A) 680 m B) 720 m
C) 800 m D) 700 m
 
Answer & Explanation Answer: B) 720 m

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Q:

The SI unit of weight is a

A) Kg B) Newton
C) Gram D) Dyne
 
Answer & Explanation Answer: B) Newton

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Q:

Consider a hypothetical planet whose mass and radius are both half that of Earth. If g is the acceleration due to gravity on the surface of Earth, the acceleration due to gravity on the planet will be

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

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Q:

A 5 kg object is raised through a height of 4 m. The work done by the force of gravity acting on the object is (take g = 10 m/s2)

 

A) 200j B) 20j
C) -20j D) -200j
 
Answer & Explanation Answer: D) -200j

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