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What is the gravitational force exerted by the sun on the earth?
The gravitational force exerted by the Sun on the Earth holds the Earth in an orbit around the Sun. Let us assume (hat the orbit is perfectly circular. The work done by this gravitational force during a short time interval in which the Earth moves through a displacement in its orbital path is (a) zero (b) positive (c) negative (d) impossible to determine
 

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Shashank Srivastav
Shashank SrivastavLv6
2 Nov 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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A comet moves about the Sun in an elliptical orbit, with its closest approach to the Sun being about 0.630 AU and its greatest distance from the sun being 39.0 AU (1 AU = the Earth-Sun distance). If the comet's speed at closest approach is 54.0 km/s, what is its speed when it is farthest from the Sun? (The gravitational force exerted by the Sun on the comet is parallel to the moment arm, so exerts no torque. Therefore, angular momentum of the comet around the Sun is conserved.)

1)The earth makes a gravitational force on the moon, and themoon makes a gravitational force on the earth. Which of theseforces is larger?
a)The gravitational force of the earth on the moon isgreater.
b)The gravitational force of the moon on the earth isgreater.
c)The two forces are equal.
d)There is no way to tell.
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b)your weight would be ½ its value at the surface of theearth.
c)your weight would be ¼ its value at the surface of theearth.
d) you would be weightless.
3) The moon has potential energy because it is near the earth. Ifit were twice as far from the earth as it is now,
a) its potential energy would be higher than it is now.
b) is potential energy would be less than it is now.
c) its potential energy would be the same as it is now.
4) Suppose a satellite has a circular orbit around the earth. Whydoes it stay in orbit?

a)Because gravity does not act on it in the vacuum of space.
b)Because it is in equilibrium; the inward pull of gravity isbalanced by an outward force.
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5)

Which of the following statements is true?


Planets move in circularorbits, with the Sun in the center of the orbit.
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Planets move in ellipticalorbits, with the Sun located off-center.

PLEASE HELP ME PICK THE RIGHT ANSWER FOR EACH QUESTIONS. PLEASEWRITE OUT THE WHOLE ANSWER AND THE LETTER. THANK YOU!

A satellite moves in a circular orbit at a constant speed around the Earth . Which of the following statements is true ? 

(a) No force acts on the satellite . (b) The satellite moves at constant speed and hence doesn't accelerate. (c) The satellite has an acceleration 

directed away from the Earth. (d) The satellite has an acceleration directed toward the Earth. (e) Work is done on the satellite by the gravitational force.

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