Outline
Doppler Effect
Gravity
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Doppler Effect and Gravity: Understanding Weight on Earth and Moon, Study notes of Physics
The doppler effect and gravity concepts through figures, equations, and examples. It explains the weight of an object on earth and the moon using newton's universal law of gravitation and provides an interactive quiz to test your understanding.
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Pre 2010
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Outline
Doppler Effect
Gravity
Figure 14.
Doppler Effect / Shock Waves
Doppler Radar
Newton's Universal Law of Gravitation
F=−
G m
1
m
2
r
2
r
G=6.67× 10
− 11
[SIUnits]
What is the weight of 50 kg on the Moon?
m
M
=7.3× 10
22
[kg]
R
M
= 1700 [km]
-A- 490 N -C- 80 N
-B- 50 N -D- 120 N
Why does the Earth orbit the sun?
(and not the other way around)
(A) Planets orbit stars (Kepler's fourth
law).
(B) The sun is one million times as
massive as Earth, so it exerts a far
greater force on Earth.
(C)The sun and Earth both orbit their
center of mass.
(D) Some other reason not given here.