First slide

Gravitational force and laws

Question

The distance of a planet from the sun is 5 times the distance between the earth and the sun. The time period of the planet is

Moderate

A

5^3/2 years
B

5^2/3 years
C

5^1/3 years
D

5^1/2 years

Solution

$\frac{T_{2}}{T_{1}} = {(\frac{r_{2}}{r_{1}})}^{3 / 2}$
$T_{2} = 5^{3 / 2} year$

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