# Physics

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(1) What is the linear speed of the earth in its orbit about the sun? Give your answer in meters per second. (Consider the earth's orbit to be a circle of radius 1.50×1011 m.)

(2) What is the linear speed of Jupiter in its orbit about the sun? Give your answer in meters per second. (Consider the orbit of Jupiter to be a circle of radius 7.78×1011 m and that it takes 11.90 yr for one orbit around the sun.)

• Physics -

C = 2pi * r meters
length of a year is t = 3.16*10^7 seconds

just divide C/t

• Physics -

Speed = 2*pi*r/t
= 2*3.142*1.50E11/3.16E7
= 29,829m/s

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