Physics GK · all questions

Gravitational Force
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Q41

Which of the following is not an example of gravity?

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Q42

Which one of the following statement about gravitational force is not correct?

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Q43

A car falls from an inclined section, and falls to the ground in 0.9 seconds. (Suppose g = 10m/s²) What is its speed while hitting the ground?

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Q44

If the mass of a person is 60 kg on the surface of earth then the same person's mass on the surface of the moon will be:

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Q45

If your weight 38 kg on Earth, what will be your weight on the planet Mercury?

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Q46

What will be the effect on the rock brought from the lunar surface?

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Q47

Suppose the force of gravitation between two bodies of equal masses is F. If each mass is doubled keeping the distance of separation between them unchanged, then the force would become

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Q48

What is weight?

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Q49

The mass of an object is 10 kg. What will be its weight on Earth? (g = 9.8 ms^-2)

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Q50

Every object in the universe attracts another object with a force, which is inversely proportional to the square of . . . . . . . .

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Q51

Acceleration due to gravity g = . . . . . . . .

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Q52

What will be the ratio of acceleration due to gravity at a depth 'h' below the surface of the earth and a height 'h' above the surface of earth where, R_e is the radius of the earth, h << R_e-

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Q53

A car falls from the bridge to the ground in 0.8 seconds. What will be its speed at the time of hitting the ground? given (g) = 10ms^-2

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Q54

Which of the following statements is true?
1. The value of 'g' on Mount Everest is > g
2. The value of 'g' on Mount Everest is < g.
3. After 15 seconds a ball is thrown vertically and returns to the ground. Its velocity is 75 m/s.
4. A ball is returned to the ground after 15 seconds when thrown vertically. Its velocity is 150 m/s.

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Q55

If the distance between two particles increases, what is the effect on the force of gravitational between them?

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Q56

The distance travelled in 2s independently of a body falling freely will be . . . . . . . .

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Q57

Consider the following statements. The acceleration due to earth's gravity decreases if
1. we go up from the surface of the earth.
2. we go from the equator towards the pole.
3. the rotation speed of the earth is increased.
4. we go down from the surface of the earth towards its centre.
Which of these statements are correct?

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Q58

When two eggs are dropped from a certain height in such a way that one egg falls on the floor and the other on the pillow, which of the following will not be a possible outcome?

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Q59

The minimum number of geo-stationary satellites needed for uninterrupted global coverage

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Q60

What is the escape velocity for the Earth?

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