Gravitational Force MCQ question and answer with solution

61

Which of the following statements is incorrect?

A) The weight of the object is maximum at the poles and minimum at the equator B) The weight of the object is minimum at the poles and maximum at the equator C) The weight of the object at the center of the Earth is zero D) When the object is moved to a higher height, its weight decreases

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Answer & Solution

Answer: Option B

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62

Which of the following is correct about moon's gravitation?

A) Moon's gravitation = $${\frac{1}{6}^{th}}$$ of Earth's gravitation B) Moon's gravitation = $${\frac{1}{6}^{th}}$$ of Mars gravitation C) Moon's gravitation = $${\frac{1}{8}^{th}}$$ of Earth's gravitation D) Moon's gravitation = $${\frac{1}{8}^{th}}$$ of Mars gravitation

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Answer: Option A

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63

If the earth rotates faster than its present speed, the acceleration due to gravity will

A) Increase at the equator but remain unchanged at the poles B) decrease at the equator but remain unchanged at the poles C) remain unchanged at the equator but decrease at the poles D) remain unchanged at the equator but increase at the poles

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Answer: Option B

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64

The free fall acceleration g increases as one proceeds at sea level, from the equator towards either pole. The reason is

A) earth is a sphere with same density everywhere B) earth is a sphere with different density at the polar regions than in the equatorial regions C) earth is approximately an ellipsoid having its equatorial radius greater than its polar radius by 21 km D) earth is approximately an ellipsoid having its equatorial radius smaller than its polar radius by 21 km

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Answer: Option C

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65

The SI unit of universal gravitation constant (G) is

A) Nm² kg² B) Nm² kg^-2 C) Nm^-2 kg^-2 D) Nm^-2 kg²

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Answer & Solution

Answer: Option B

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66

The weight of an object is maximum:

A) at the poles B) equator C) on the tropics D) on the sub tropics

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Answer & Solution

Answer: Option A

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67

Which one of the following statement is correct?

A) The measurement of mass taken by a spring weighing balance is correct at the place where the spring balance is calibrated for B) The measurement of mass taken by a spring weighing balance is correct at all places C) The measurement of mass taken by a spring weighing balance is correct at the places where the acceleration due to gravity is same with the place where the spring balance is calibrated for D) A spring balance cannot be used to measure mass at any place

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Answer: Option D

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68

In planetary motion, the angular momentum conservation leads to the law of

A) orbits B) areas C) periods D) Conservation of kinetic energy

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Answer & Solution

Answer: Option B

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69

Free fall possible only in-

A) atmosphere B) air C) sea D) vacuum

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Answer & Solution

Answer: Option D

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70

Which one of the following statements is not correct?

A) Weight of a body is different on different planets B) Mass of a body on the earth, on the moon and in empty space is the same C) Weightlessness of a body occurs when the gravitational forces acting on it is counter-balanced D) Weight and mass of a body are equal at sea level on the surface of the earth

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Answer: Option D

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