Question

How do you know when to use g= 9.81 or G= 6.674x10^-11 for "gravitational force"?

Answer #1

I need to make a model in MATLAB for free-fall using Euler
method.
g=9.81 (gravitational acceleration)
c=12.5 (drag coefficient)
m= 68.1 (mass)
h=0.1 (step size)
v(0)=0 (Velocity is 0 at time zero)
t=[0:100]*h (100 steps)
Vnew= vt+(g-(c/m)*v)*h (this is the equation for the velocity at
each subsequent step
I want to use a "for" loop in MATLAB but i don't know how to
write it properly. Could anyone help me?

How much greater is the Sun’s gravitational force on Jupiter
compared with the Sun’s gravitational force on the Earth? Use the
following information: mass of the Sun = 2.0 x 1030 kg, mass of
Jupiter = 1.9 x 1027 kg, mass of Earth = 6.0 x 1024 kg; G = 6.67 x
10-11 m3kg-1s-2; distance between Sun and Earth = 1.5 x 1011 m;
distance between Sun and Jupiter = 7.8 x 1011 m. (Round your answer
to one decimal...

How much greater is the sun's gravitational force on
jupiter compared with the sun's gravitational force on the earth?
Use the following information: Mass of sun = 2*10^30kg. Mass of
jupiter = 1.9*10^27kg. mass of earth = 6*10^-11. Distance between
the sun and the earth =1.5*10^11m. Distance between sun and jupiter
= 7.8*10^11m

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gravitational force or electric force? Do a calculation with each
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The easy measurement of g=9.81 m/s2, in the
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and ME the mass of Earth), if the Radius
RE, of Earth is known, given that
g=GME/RE2.
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