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Physics Personal > Gravitational Fields > Flashcards

Gravitational Fields Flashcards

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1
Q

What is the formula for gravitational potential energy (GPE)?

A

GPE = -GMm/r

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2
Q

In the formula GPE = mgh, what does ‘m’ stand for?

A

‘m’ stands for mass.

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3
Q

True or False: Gravitational potential energy increases as height increases.

A

True

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4
Q

What does ‘g’ represent in the equation GPE = mgh?

A

‘g’ represents the acceleration due to gravity.

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5
Q

Fill in the blank: The unit of gravitational potential energy is __________.

A

Joules (J)

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6
Q

What is the value of ‘g’ on the surface of the Earth?

A

Approximately 9.81 m/s²

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7
Q

What happens to gravitational potential energy when an object falls?

A

It decreases.

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8
Q

Define a gravitational field.

A

A gravitational field is a region of space surrounding a mass where another mass experiences a force of attraction.

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9
Q

What is the equation for the gravitational field strength (g)?

A

g = F/m=Gm/r²

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10
Q

In the equation g = F/m, what does ‘F’ represent?

A

‘F’ represents the gravitational force.

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11
Q

True or False: Gravitational field strength is a scalar quantity.

A

False

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12
Q

What is the relationship between gravitational field strength and distance from the mass?

A

Gravitational field strength decreases with increasing distance from the mass.

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13
Q

Fill in the blank: The gravitational field strength at a distance ‘r’ from a mass ‘M’ is given by __________.

A

g = GM/r²

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14
Q

What does ‘G’ stand for in the equation g = GM/r²?

A

‘G’ stands for the universal gravitational constant.

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15
Q

What is the value of the universal gravitational constant (G)?

A

6.67× 10⁻¹¹ N(m/kg)²

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16
Q

If the mass of a planet increases, what happens to its gravitational field strength?

A

It increases.

17
Q

What is the effect of doubling the height on the gravitational potential energy of an object?

A

It doubles the gravitational potential energy.

18
Q

True or False: An object in free fall has zero gravitational potential energy.

A

False

19
Q

What happens to gravitational potential energy when an object is lifted vertically?

A

It increases.

20
Q

What is the formula for force due to gravity?

A

F=GMm/r²

21
Q

What is Newton’s law of gravitation?

A

The force due to gravity between two masses in a gravitational field is proportional to the product of the masses and inversely proportional to the square of the separation.

22
Q

Define gravitational potential

A

The energy required per unit mass to move an object from infinity to a point in a gravitational field.

23
Q

Define gravitational potential energy

A

The energy requires to move a mass from infinity to a point in a gravitational field

24
Q

What is the equation for gravitational potential?

A

Vg=-GM/r

Physics Personal (9 decks)

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