The orbital speed of a planet about its star is 3.1
The orbital speed of a planet about its star is 3.1
Homework Answers
a) What is the magnitude of the force exerted by the star on the planet will be equal to centripetal force or m*v^2/r (m is mass of planet )
or (6*1024*9.61*108)/(1.6*1011) N or 36.0375 * 1021 N
B) What is the mass of the star?
now centripetal force must be equal to gravitational pull of the sun
or m1v^2/r = G*m1*m2/r^2 (m1 is mass of planet , m2 is mass of sun)
or m2 = v^2 *r /G
or m2 = (3.1*104)2*(1.6*1011)/6.67384
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