Orbital mechanics — Question 10
Original QCE Vault practice · 1 mark
Q10 · Practice questionComplex familiar1 mark
QUESTION 10
A satellite is in a circular orbit of radius 8.0×106m around a planet of mass 6.0×1024kg. Its orbital speed is closest to (A)3.54×103m s−1 (B)5.00×103m s−1 (C)7.07×103m s−1 (D)1.00×104m s−1 WORKED SOLUTION
Answer C
1 markWorked solution
For a circular orbit, GMm/r2=mv2/r, so v=GM/r=(6.67×10−11)(6.0×1024)/(8.0×106)=7.07×103m s−1. Select the correct option.
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