Physics GK · all questions

Gravitational Force
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Q141

If the gravitational force of the Earth suddenly disappears, which are of the following will be the correct consequence?

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Q142

Mass of a particular amount of substance
1. is the amount of matter present in it.
2. does not vary from place to place.
3. changes with change in gravitational force.
Select the correct answer:

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Q143

Astronauts in space cannot stand erect. This is because, in space

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Q144

The mass of a body at the centre of the Earth is

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Q145

In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true?

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Q146

A ball thrown vertically upward returns to the ground in 13.5 seconds. At what speed was he thrown. (g = 10ms^-2)

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Q147

Which of the two statements given by A and B is/are true? What is the force of gravitational:
A. Is directly proportional to the multiplication of the mass of two objects.
B. Is directly proportional to the square of the distance between to objects.

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Q148

What is called the force of attraction between any two physical objects?

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Q149

Each object of the universe attracts another object by a force is proportional to . . . . . . . .

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Q150

Which of the following is incorrect statement-

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Q151

The two balls of iron and wood of same weight dropped from the same height, then

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Q152

The sensation of weightlessness in a spacecraft in an orbit is due to the

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Q153

What is the name of the force with which Earth pulls everything towards itself?

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Q154

Consider the following statements. The escape velocity depends on
1. radius of the planet.
2. temperature of the planet.
3. mass of the planet.
4. mass of the particles escaping.
Select the correct answer:

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Q155

The value of acceleration due to gravity does not depend on . . . . . . . .

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Q156

If the Earth stops rotating, the apparent value of g on its surface will

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Q157

Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be

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Q158

A Geosynchronous satellite continuously active in its orbit due to centrifugal force which is obtained by

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Q159

Who discovered the law of planetary motion?

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Q160

The period of a satellite in a circular orbit around a planet is independent of

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