Gravitational Force MCQ question and answer with solution

11

Approximate escape velocity on the surface of the Earth.

A) 13.8 km/s B) 11.2 km/s C) 21.3 km/s D) 4.3 km/s

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Answer & Solution

Answer: Option B

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12

An object was thrown upwards at a speed of 14m/s and find 10m height. Calculate the time taken by the object to reach the highest point.

A) 1.63 s B) 1.33 s C) 1.53 s D) 1.43 s

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Answer & Solution

Answer: Option D

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13

Why does a stone thrown towards the sky return to the earth?

A) The downward pressure pulls it towards the earth B) The centripetal force, which pulls it towards the earth C) The work done by the object pulls it towards the earth D) There is a gravitational force which pulls it towards the ground

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Answer & Solution

Answer: Option D

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14

The force of gravity exists between . . . . . . . . objects, but cannot be felt until the mass of objects, such as planets, is very high-

A) four B) each and every C) only two D) only one

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Answer & Solution

Answer: Option B

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15

Consider the following statements.
1. The time period of satellite does not depend on the radius of the orbit.
2. The orbital velocity is inversely proportional to the square root of the radius of the orbit.
3. The orbital velocity of a satellite increases with the radius of the orbit.
Which of the statement(s) given above is/are correct?

A) Only 1 B) Only 2 C) 1 and 2 D) 1, 2 and 3

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Answer & Solution

Answer: Option B

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16

The force of gravity between of two objects is F. If the mass of objects is halved without changing their distance, the gravitational force will be:

A) 2F B) F C) $$\frac{F}{2}$$ D) $$\frac{F}{4}$$

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Answer & Solution

Answer: Option D

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17

The weight of a body at the center of the Earth will be:

A) zero B) infinite C) as much as on the surface of the earth D) None of the above

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Answer & Solution

Answer: Option A

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18

The radius and mass of a planet are half of the Earth's radius and mass. What will be the value of g on this planet?

A) 4.9 m/s² B) 9.8 m/s² C) 19.6 m/s² D) 39.2 m/s²

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Answer & Solution

Answer: Option C

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19

When an object reaches its top when thrown upwards, its-

A) The velocity is zero, and its acceleration is zero B) The velocity is zero, and its acceleration is about 10 m/s² C) The velocity is 10 m/s and its acceleration is zero D) The velocity is 10 m/s and its acceleration is about 10 m/s

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Answer & Solution

Answer: Option B

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20

The kinetic energy given to the body to project it with the escape velocity is called

A) escape energy B) potential energy C) orbital velocity D) None of these

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Answer & Solution

Answer: Option A

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