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Find the acceleration due to gravity on ...

Find the acceleration due to gravity on a planet that is 10 times as massive as the Earth and with radius 20 times of the radius of the Earth.

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Let mass of the planet be` M_p` , radius of the Earth be `R_E` , mass of the Earth be `M_E` and` g_p` be acceleration due to gravity on the planet.
`g =(GM_E)/(R_E^2) , g_p = (GM_p)/(R_p^2)`
` therefore g_p = (G(10M_E))/((20R_E)^2)`
` = (10GM_E)/(400R_E^2)`
` = 1/40 g `
` = 0.245 m//s^2`
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