set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on motion under gravity topic of general science mcq
(a) 21.1 km/s
(b) 15.0 km/s
(c) 7.0 km/s
(d) 11.2 km/s
The correct answers to the above question in:
Answer: (d)
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Read more physics gk quiz Based General Science Questions and Answers
Question : 1
If the radius of the Earth were to shrink by one percent, its mass remaining the same, the value of g on the Earth’s surface would
a) Increase by 2%
b) Increase by 0.5%
c) Decrease by 0.5%
d) Decrease by 2%
Answer »Answer: (a)
Question : 2
The Earth travels in its orbit at a speed of approx. 4,400 km per hour. Why do we not feel this high speed?
a) Our relative speed with respect to the Earth along the Earth’s orbit is zero
b) Because we are too small compared to the size of the Earth
c) The solar system as a whole is also moving
d) The gravity of the Earth constantly pulls us towards the Earth’s centre
Answer »Answer: (a)
Question : 3
The acceleration due to gravity of a destructive Earthquake will be
a) >750 cm/$s^2$
b) >550 cm/$s^2$
c) >950 cm/$s^2$
d) >980 cm/$s^2$
Answer »Answer: (d)
Question : 4
If the gravitational force of the Earth suddenly disappears, which are of the following will be the correct consequence?
a) The mass of the object will become zero but the weight will remain the same
b) The weight of an object will become zero but the mass will remain the same
c) Both the mass and the weight of the object will become zero
d) The mass of the object will increase
Answer »Answer: (b)
Question : 5
Two balls A and B are of 10 kg and 1 kg, respectively. They are dropped simultaneously from a height of 20 m. Which of the following is correct?
a) B will reach the ground first
b) A will reach the ground first
c) Both A and B will reach the ground at the same time
d) None of the above
Answer »Answer: (c)
Question : 6
Why do pendulum checks usually lose time in summer?
a) Due to friction caused by coils
b) Due to longer days in summer
c) The length of the pendulum increases, increasing the time period of unit oscillation
d) The weight of the pendulum change in summer
Answer »Answer: (c)
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