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# Mass and radius of three of the nine solar planets

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I need the mass and radius of three of the nine planets in our solar system. Be sure that the masses are expressed in kilograms and the radii are expressed in meters. I chose Pluto, Venus, and Mars.
Using your data, calculate the gravitational acceleration on each of the three planets you selected. The masses should be measured in kilograms and the radii in meters, the units of gravitational acceleration would turn out to be meters per squared seconds.
Use the gravitational accelerations that you calculated in Step 2 to find the period of a 2 meter long simple pendulum on each of the NINE PLANETS. I was told the length of a simple pendulum is normally expressed in meters, so it is sufficient to replace L with the number 2 in the period expression