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Q:

In Force equation, F is equal to

 

A) ma B) mv
C) u+at D) mgh
 
Answer & Explanation Answer: A) ma

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Q:

Calculate the work done by the force of gravity when a satellite moves in an orbit of radius 40,000 km around the earth.

A) 8,000 J B) 4,00,000 J
C) 0 J D) 4,000 J
 
Answer & Explanation Answer: C) 0 J

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Q:

The forces between two bodies are always equal and opposite. This idea is stated in the form of Newton's

A) first and second law of motion B) first law of motion
C) third law of motion D) second law of motion
 
Answer & Explanation Answer: C) third law of motion

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Q:

A ball of 0.1 kg is dropped from rest. When it falls through a distance of 2 m, the work done by the force of gravity is

A) 0.98 J B) -0.98 J
C) 1.96 J D) -1.96 J
 
Answer & Explanation Answer: C) 1.96 J

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Q:

Consider the given statement to be true and decide which of the conclusions logically follows from the statement.

 

Statement :

Weight is also a force.

 

Conclusions :

1. The unit of weight is Newton.
2. The unit of weight is Kilograms.

 

A) Only conclusion 1 follows B) Both conclusions 1 and 2 follows
C) Only conclusion 2 follows D) Neither conclusion 1 nor 2 follows
 
Answer & Explanation Answer: A) Only conclusion 1 follows

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Q:

Which motion has magnitude of static frictional force directly proportional to normal reaction?

A) Impending motion B) Actual motion
C) Both 1 and 2 D) None of the above
 
Answer & Explanation Answer: A) Impending motion

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Q:

Which of the following scientists gave the law that governs the force of attraction/repulsion between two charged particles?

A) Charles Dufay B) Michael Faraday
C) Archimedes D) Charles Coulomb
 
Answer & Explanation Answer: D) Charles Coulomb

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Q:

During the day which process is the major driving force in the movement of water in the xylem?

A) Transpiration pull B) Evaporation
C) Suction D) Translocation
 
Answer & Explanation Answer: A) Transpiration pull

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