set 5 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on mechanics (mass, force, acceleration, work, energy, momentum, velocity) topic of general science mcq
- Copernicus discovered that the earth moves around the sun.
- An astronaut cannot use a straw to sip a drink on the surface of the moon.
- The S.I. unit of weight is kilogram.
(a) 2 and 3
(b) 1 and 2
(c) 1 and 3
(d) 1, 2 and 3
The correct answers to the above question in:
Answer: (b)
The weight of an object is the force on the object due to gravity.
The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton.
Practice mechanics (mass, force, acceleration, work, energy, momentum, velocity) (set 5) Online Quiz
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Read more mechanics work and energy Based General Science Questions and Answers
Question : 1
In wind power, which form of energy is converted into electrical energy?
a) Solar energy
b) Potential energy
c) Kinetic energy
d) Radiant energy
Answer »Answer: (c)
Question : 2
A book is kept on the surface of a table. If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by
a) the table on the book
b) the book on the earth
c) the book on the table
d) the table on the earth
Answer »Answer: (a)
Question : 3
The potential energy of a freely falling object decreases progressively.
a) Sum of Potential Energy and Kinetic Energy at any point during the free fall remains constant
b) Potential energy gets converted into kinetic energy progressively
c) The law of conservation of energy is violated
d) Both (a) and (b)
Answer »Answer: (d)
Question : 4
If a light body and a heavy body have equal momentum, then
a) the kinetic energy of the lighter body is equal to the kinetic energy of the heavier body
b) the lighter body has lesser kinetic energy than the heavier body
c) the lighter body has greater energy than the heavier body
d) the kinetic energy of both the bodies are independent of momentum.
Answer »Answer: (a)
Question : 5
Assertion (A):
A man standing on a completely frictionless surface can propel himself by whistling.
Reason (R):
If no external force acts on a system, its momentum cannot change.
Code
a) (A) is true, but (R) is false
b) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
c) Both (A) and (R) are true and (R) is the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (b)
Question : 6
For a given mass and size, moment of inertia of a solid disc is
a) equal to that of a ring
b) less than that of a ring
c) more than that of a ring
d) depend on the material of ring and disc
Answer »Answer: (b)
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