Gravitational Force MCQ question and answer with solution

81

What is the path of revolving motion of planet?

A) Round shape B) Straight line C) Oval D) Elliptical

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Answer & Solution

Answer: Option D

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82

What would be the minimum energy required to launch a satellite of m kg from the Earth's surface in a circular orbit at an altitude of 2R? The radius of the Earth is R.

A) 2 mgR B) 3 mgR C) $$\frac{1}{5}mgR$$ D) $$\frac{5}{6}mgR$$

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Answer & Solution

Answer: Option D

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83

Two stones of different masses are dropped simultaneously from the top of a building,

A) smaller stone reaches the ground earlier B) larger stone reaches the ground earlier C) both the stones reach the ground at the same time D) depends on the composition of the stone

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Answer & Solution

Answer: Option C

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84

The magnitude of the gravitational force will be equal to the . . . . . . . .

A) product of mass and acceleration due to the the gravitational force B) ratio of mass and acceleration due to the gravitational force C) ratio of acceleration due to the gravitational force and mass D) reciprocal of product of mass and acceleration due to the gravitational force

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Answer & Solution

Answer: Option A

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85

If an object is falling from above, its weight remains

A) Zero B) Same C) Change D) None of these

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Answer & Solution

Answer: Option B

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86

The force of gravity between any two bodies in the universe does not depend on . . . . . . . .

A) Distance between them B) Product of their masses C) Gravitational constant D) Sum of their masses

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Answer & Solution

Answer: Option D

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87

What do the terms Geocentric and Heliocentric refer to-

A) Laws governing the motion of planetary bodies around Earth and Sun B) Pioneering Telescopic Model C) Religions of Ancient Greece D) Two schools of thought in Roman philosophy

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Answer & Solution

Answer: Option A

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88

Earth attracts things towards itself this is due to . . . . . . . .

A) Gravitational force B) Centripetal force C) Electromagnetic force D) Centrifugal force

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Answer & Solution

Answer: Option A

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89

If the mass of an object is 600 kgs, what will be its weight on the moon? (N = Newton)

A) 60 N B) 600 N C) 100 N D) 960 N

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Answer & Solution

Answer: Option D

Solution:

Mass is constant and does not change with location

Given mass = 600 kg

Weight is calculated using W = m × g

On the Moon, gravity is approximately 1/6th of Earth's gravity

So, g (Moon) ≈ 9.8 / 6 ≈ 1.63 m/s²

Now, Weight on Moon = 600 × 1.63 ≈ 978 N

This is approximately equal to 960 N (nearest option)

Hence, the correct answer is Option D.

90

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) Because we are too small compared to the size of the Earth B) Our relative speed with respect to the Earth along the Earth's orbit is zero C) The solar system as a whole is also moving D) The gravity of the Earth constantly pulls us towards the Earth's centre

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Answer & Solution

Answer: Option B

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Gravitational Force MCQ question and answer with solution | Physics Gk MCQs