Physics Questions

Q:

The force of friction between two surfaces will increase if:

A) a layer of lubricant is kept between the two surfaces B) the two surfaces are pressed harder
C) air gap is created between the two surfaces D) irregularities on both the surfaces are removed
 
Answer & Explanation Answer: B) the two surfaces are pressed harder

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Q:

Which of the following is not a vector quantity?

A) Work B) Force
C) Displacement D) Velocity
 
Answer & Explanation Answer: A) Work

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Q:

The motion of a freely falling body is an example of ______________ accelerated motion.

A) non-uniformly B) uniformly
C) uniquely D) specially
 
Answer & Explanation Answer: B) uniformly

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Q:

A wooden block of mass m1 kg accelerates at m/s when a force of 5 N acts on it. Another block of mass m2 kg accelerates at 20 m/s when the same force acts on it. If both the blocks are tied together and the same force acts on their combination, the acceleration will be about

 

A) 6.67 m/s2 B) 1.67 m/s2
C) 5.67 m/s2 D) 4.67 m/s2
 
Answer & Explanation Answer: A) 6.67 m/s2

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Q:

Find the acceleration (in m/s2) of a body which accelerates from 10 m/s to 20 m/s in 4 seconds.

A) 7.5 B) 15
C) 5 D) 2.5
 
Answer & Explanation Answer: D) 2.5

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Q:

Consider a hypothetical planet with a mass equal to half that of Earth and radius is one-third that of Earth. If g is the acceleration due to gravity on Earth, the acceleration due to gravity on the planet will be

A) (1/2)g B) (9/2)g
C) (5/2)g D) (3/2)g
 
Answer & Explanation Answer: B) (9/2)g

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Q:

What is the SI unit of electric current?

A) Newton B) Joule
C) Ampere D) Watt
 
Answer & Explanation Answer: C) Ampere

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Q:

What is the SI unit of pressure?

A) Newton B) Weber
C) Pascal D) Henry
 
Answer & Explanation Answer: C) Pascal

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