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Physics GCSE > The Universe > Flashcards

The Universe Flashcards

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1
Q

What is the shape of most planets orbits?

A

Ellipses that are close to being circles

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2
Q

What is the shape of most comets orbits?

A

Stretched ellipses with long orbital periods

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3
Q

In which direction to comets tails point?

A

They always point away from the star they are orbiting

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4
Q

Are satellites natural or artificial?

A

Both

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5
Q

Name two natural satellites?

A

Earths moon and one of Jupiters moons Callisto

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6
Q

Name two artificial satellites?

A

International space station and Landsat 7

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7
Q

What is the orbital speed equation?

A

v=2πr/T

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8
Q

What does v stand for in the orbital speed equation?

A

Orbital speed (m/s)

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9
Q

What does r stand for in the orbital speed equation?

A

Orbital radius (m)

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10
Q

What does T stand for in the orbital speed equation?

A

Time period (s)

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11
Q

What has a gravitational field?

A

An object with mass

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12
Q

What gives an object a bigger gravitational force?

A

A bigger mass

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13
Q

What is weight?

A

Weight is the gravitational force between two objects

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14
Q

What is the equation for weight?

A

W=mg

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15
Q

What does W stand for in the weight equation?

A

Weight (N)

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16
Q

What does m stand for in the weight equation?

A

Mass (kg)

17
Q

What does g stand for in the weight equation?

A

Gravitational field strength (N/kg)

18
Q

What does mass mean?

A

How much material makes up an object

19
Q

How does your mass differ if you moved from Earth to Jupiter?

A

It doesn’t

20
Q

How does your weight differ if you moved from Earth to Jupiter?

A

It gets greater as Jupiters mass is bigger therefore greater gravitational pull

Physics GCSE (9 decks)

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