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23 Nov 2019

At night, you are farther away form the sun than during the day. What's more, the force exerted by the sun on you is downward into Earth at night and upward into the sky during the day. If you had a sensitive enough bathroom scale, would you appear to weigh more at night than during the day?

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Beverley Smith
Beverley SmithLv2
2 Sep 2019

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Related textbook solutions

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

Related questions


gravity force probelm
1. The problem statement, all variables and given/known data
When the Earth, Moon, and Sun form a right triangle, with the Moonlocated at the right angle, as shown in the figure , the Moon is inits third-quarter phase. (The Earth is viewed here from above itsNorth Pole.)

Find the magnitude of the net force exerted on the Sun.
Find the direction of the net force exerted on the Sun. Give thedirection relative to the line connecting the Sun and theMoon.

2. Relevant equations
Gm1m2/R2
Fnet=vF12+F22
LaTeX Code: \\theta = inverse trig (whatever necessary)
Mass sun=1.99E30
Mass earth= 5.98E24
mass moon= 7.35E22
radius sun to moon=1.50E11
radius moon to earth=3.85E8
3. The attempt at a solution
F1(Sun-Moon)=4.336E20 found by using gravity force eq.
F2(sun earth)= 3.53E22, however this is wrong because it should be3.58E22, so that means the distance between the sun and the earthat this time would have to be 1.49E11, which doesn't make sincebecause this should be the hypotenuse, right???. So when using thesencond value for F2, and using hte pythagorean theory I getFnet=3.57E22, which is the right answer.
NOW to find the direction, i thought you can use the cos inverse*F1/F2, but this turns out to be the wrong answer I have no ideawhat else to do. Please help!

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.
2) Suppose you could climb a ladder whose height is equal to theradius of the earth. At the top of this ladder
a) your weight would be the same as it is at the surface of theearth.
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.
c) Because as it moves tangentially, the satellite is acceleratedby the force of gravity toward the center of the earth.

5)

Which of the following statements is true?


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

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