Physics GK · all questions

Gravitational Force
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Q121

Earth's escape velocity is

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Q122

The weight of an object on Earth is 200N. What is its mass? (g = 10ms^-2)

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Q123

Assertion (A) The speed of satellite always remain constant in an orbit.
Reason (R) The speed of a satellite depends on its path.

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Q124

Symbol of universal gravitational constant is . . . . . . . .

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Q125

Gravitational force is defined by the force of attraction between-

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Q126

The period of revolution of a geo-stationary satellite is

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Q127

The Leaning Tower of Pisa does not fall because

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Q128

A rocket is launched to travel vertically upward with a constant speed of 20 m/s. After travelling 35 seconds, a problem arises in the rocket and its fuel supply stopped. The rocket travels like a free body. The height attained by it is:

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Q129

If the distance between the Earth and the Sun were twice what it is now, the gravitational force exerted on the Earth by the Sun would be

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Q130

Value of 'g'.

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Q131

Which of the following is not a chemical reaction?

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Q132

the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is . . . . . . . .

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Q133

Why do pendulum checks usually lose time in summer?

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Q134

A bullet is fired directly upwards at a velocity of 196m/s. What maximum height will the gunshot reach? (Suppose that g = 9.8 m/s²)

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Q135

SI unit of universal gravitational constant G is-

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Q136

An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth

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Q137

Consider the following statements.
A Simple Pendulum is set into oscillation. Then,
1. the acceleration is zero when the bob passes through the mean position.
2. in each cycle the bob attains a given velocity twice.
3. both acceleration and velocity of the bob are zero when it reaches its extreme position during the oscillation.
4. the amplitude of oscillation of the simple pendulum decreases with time.
Which of these statements are correct?

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Q138

A ball is thrown vertically upwards at a velocity of 20 m/s. What will be the perimeter of displacement after 3 seconds? (g = 10 m/s²)

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Q139

In some region, the gravitational field is zero. The gravitational potential in this region

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Q140

Which of the following statements is/are incorrect?
1. The value of G on the Moon is equal to the value of G on Earth.
2. The gravitational force applied between two objects placed at a distance of 1 meter from each other, whose masses are of 2 kg each, is 26.68 × 10^-11 N.
3. Newton's law of gravity is valid only in the laboratory.
4. Force is inversely proportional to the square of the distance between two objects.

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