set 3 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
- The gravitational force exerted by the sun on the moon is greater than the gravitational force exerted by the earth on the moon.
- A heavy body falls at a faster rate than a light body in vacuum.
(a) 1 and 2 both
(b) 1 only
(c) 2 only
(d) None
The correct answers to the above question in:
Answer: (b)
Thus, the gravitational force F between two bodies is directly proportional to the product of the masses of those bodies.
Here, since the product m1m2 is greater for the sun and the moon than that of the earth and the moon (because the mass of the sun is greater than that of the earth), therefore F exerted by the sun on the moon is greater than the F exerted by the earth on the moon
Practice mechanics (mass, force, acceleration, work, energy, momentum, velocity) (set 3) Online Quiz
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Read more mechanics work and energy Based General Science Questions and Answers
Question : 1
A couple produces a
a) no motion.
b) pure rotational motion
c) pure linear motion
d) both linear and rotational motion
Answer »Answer: (b)
Two forces equal in magnitude but opposite in direction form a couple which tends to rotate the body.
Question : 2
A truck, a car and a motorcycle have equal kinetic energies. If equal, stopping forces are applied and they stop after travelling a distance of X, Y and Z respectively, then
a) X = Y = Z
b) X < Y < Z
c) X > Y > Z
d) X ≅ 4Y ≅ 8Z
Answer »Answer: (a)
Question : 3
How much time will it take to perform 440 J of work at a rate of 11 W?
a) 30 s
b) 40 s
c) 50 s
d) 20 s
Answer »Answer: (b)
Question : 4
| 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 : 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
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)
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