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December 20, 2014

December 20, 2014

Posted by **sara** on Saturday, January 5, 2013 at 8:55pm.

a) determine the gravitational field strength of Ceres at this height.(ans 0.28 n/kg)

b) determine the mass of Ceres. (ans 9.4 x 10^20 kg)

c) determine the gravitational field strength of Ceres at an altitude of 150 km above its surface. (ans 0.16 N/kg)

- physics -
**drwls**, Sunday, January 6, 2013 at 5:26ama). The effective acceleration of gravity, g', is given by

(1/2)g'*t^2 = 1.25 m

g' = 2.5/9 = 0.28 m/s^2. (or N/kg)

b) G M/R^2 = 0.28 N/kg

G is the universal gravity constant. Look it up and solve for asteroid mass M.

c) g' falls inversely with the square of the distance from the center. Multiply the surface value, 0.28 N/kg, by (476 km/626 km)^2

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