set 2 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
(a) mg – ma
(b) ma – mg
(c) ma
(d) mg + ma
The correct answers to the above question in:
Answer: (a)
Practice mechanics (mass, force, acceleration, work, energy, momentum, velocity) (set 2) Online Quiz
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Read more mechanics work and energy Based General Science Questions and Answers
Question : 1
If a ship moves from freshwater into seawater, it will
a) rise a little higher
b) sink a little bit
c) sink completely
d) remain unaffected
Answer »Answer: (a)
Question : 2
A simple machine helps a person in doing:
a) the same amount of work slowly
b) the same amount of work with lesser force
c) less work
d) the same amount of work much faster
Answer »Answer: (b)
Question : 3
Column I | Column II |
A. Rocket propulsion | 1. Force |
B. Agent which causes acceleration | 2. Momentum |
C. Product of mass and velocity | 3. S.I. unit of force |
D. Newton | 4. Law of conservation of momentum |
a) A → S; B → P; C → Q; D → R
b) A → P; B → S; C → R; D → Q
c) A → S; B → P; C → R; D → Q
d) A → P; B → S; C → Q; D → R
Answer »Answer: (a)
Question : 4
Consider the following statement and conclusions which can be drawn from it. Choose the correct conclusion.
Statement: In starting a loaded cart, one has to push harder than to keep it moving.
Conclusion:
a) There is less friction once the cart starts moving
b) The wheels tend to slip initially
c) The weight of a moving object is less
d) Practice makes perfect
Answer »Answer: (a)
Question : 5
A simple machine helps a person in doing
a) The same amount of work slowly
b) The same amount of work with lesser force
c) Less work
d) The same amount of work much faster
Answer »Answer: (b)
Question : 6
Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass of S2 . Which one of the following statements is true?
a) The kinetic energy of the two satellites are equal.
b) S1 and S2 are moving with the same speed.
c) The potential energies of earth satellites in the two cases are equal.
d) The time period of S1 is four times that of S2
Answer »Answer: (b)
Since orbital velocity of satellite is
$V_O=√{{GM}/r}$, it does not depend upon the mass of the satellite.
Therefore, both satellites will move with same speed.
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