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The two laws that best explain how the planets are able to stay in orbit about the sun are _____.

(a) Kepler's 1st and 2nd laws of planetary motion
(b) Kepler's law of ellipses and Newton's law of inertia
(c) Newton's laws of gravity and inertia
(d) Newton's 2nd and 3rd laws of motion

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Amana Rangarajan
Amana RangarajanLv9
29 Oct 2020
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Related textbook solutions

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

Related questions

A book is resting on a horizontal table so that the only two forcesacting on it are Earth's gravity FG and normal reaction of thetable n. The result n = -FG follows


(check all that apply)
from an application of Newton's 2nd law.
from an application of Newton's 3rd law.
because the normal force always balances the force ofgravity.
because normal force is defined as gravity force in mostbooks.

18. The conservation of momentum is most closely related to 

A. Newton's 1st law.

B. Newton's 2nd law.

C. Newton's 3rd law.

D. Newton's 4th law

19. A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed?

A) 48 m/s B) 4 m/s C) 12 m/s D) 3 m/s E) none of these

20. A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared to the impulse on the car, the impulse on the truck is

A) greater

B)the same

C)smaller

D)More information is needed. 

4) According to the ancient Greeks, the Earth was the center ofthe universe and the sun, moon, stars, and planets all went aroundthe Earth. In the 1543 Copernicus proposed the heliocentric theoryof the universe in which the Earth was just another planet orbitingthe Sun and only the moon orbited the Earth.

a) What is the speed at which the Moon goes around the Earth?
b) How does the Moon's orbital acceleration compare to theacceleration of objects near the surface of the Earth?
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d) According to Newton's third law, all forces occur in pairs. Whatis the reaction to the Earth's gravity on the moon? Explain.

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