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ahrayia [7]
3 years ago
6

The mean diameters of Mars and Earth are 6.9 x 10^3 km and 1.3 x 10^4 km, respectively. The mass of Mars is 0.11 times Earth’s m

ass.
a) What is the ratio of the mean density (mass per unit volume) of Mars to that of Earth?
b) What is the value of the gravitational acceleration on Mars?
c) What is the escape speed on Mars?
Physics
1 answer:
Ksenya-84 [330]3 years ago
5 0

Answer:

Explanation:

a ) density = mass / volume

density of mars / density of earth

= (mass of mars/mass of earth) x (volume of earth / volume of mars)

= (mass of mars/mass of earth) x (diameters of earth / diameters of mars)³

=   0.11 x (130/69)³

= .73

b )

gravitational acceleration (g) = GM/R²

Gravitational acceleration on mars / Gravitational acceleration on earth

= (mass of mars / mass of earth) x (radius of earth / radius of mars )²

= .11 x (130/69 )²

= .39

Gravitational acceleration on mars = .39 x Gravitational acceleration on earth

Gravitational acceleration on mars =  9.8 x .39

= 3.82 m/s

c ) Escape velocity \sqrt{2gR }

c ) escape speed of mars / escape velocity of earth

= [( g on mars / g on earth ) x ( radius of mars / radius of earth )]°⁵

= √(.39 x 69/130)

= .4549

escape speed of mars = .4549  x escape velocity of earth

= .4549  x 11.2km/s

= 5.1 km / s

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3 years ago
For elliptical obits: the direction of the velocity of the satellite is _______________________ (always, seldom, never) perpendi
alexandr1967 [171]

Answer:

For elliptical orbits: seldom

For circular orbits: always

Explanation:

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Since acceleration has the same direction of the force (according to Newton's second law of motion), this means that the direction of the force (the centripetal force) is always perpendicular to the velocity of the object.

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An elliptical orbit correponds to a circular orbit "stretched". This means that there are only 4 points along the orbit in which the acceleration (and therefore, the net force) is perpendicular to the direction of motion (and so, to the velocity) of the satellite. These points are the 4 points corresponding to the intersections between the axes of the ellipse and the orbit itself.

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3 years ago
How does the force the Earth exerts on you compare with the force you exert on it?
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Answer:

C.Earth and you exert equal and opposite forces on each other.

Explanation:

Hello, I can help you with this

The force that the earth exerts on any object is due to the force of gravity and is known as weight, F = mg, this force is directed towards the center of the earth, in addition, according to the laws of physics for any action must have a reaction, in this case it is a force that goes out  from the ground and it is directed upwards, this force is called normal and it has the same magnitude of your weight but the opposite direction.

Have a great day.

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Filiberto va a 90m/s en su carri, de repente se distrae por un par de segundos y su velocdad pasa a 40 m/s ¿cual fue su acelerac
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Answer:

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Explanation:

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