Newton's Law of Gravity Practice Problems

A rock on Mars has a mass of 1200 kg. At midday, the rock is directly between the sun and Mars. i) Determine the force exerted on the rock by the sun. Take the distance from the rock to the sun's center as 2.28 × 10¹¹ m. ii) Contrast this force with the force on the rock from Mars (g_M = 3.72 m/s²).

A spherical mass used for short put has a mass m and diameter d. If two masses are separated by d/2 (from surface to surface) what will be the magnitude of gravitational force on the balls?

For the following configuration of masses, determine the magnitude and direction of the sum of gravitational force that spheres B and D exert on sphere C. Take all spheres to have the same mass equal to 6.0kg.

Particles of mass 2m and 3m are placed on the y-axis. The 2m mass lies at the origin while 3m has a position y. A third particle is placed on a point on the y-axis where the sum of gravitational force on it from the other two particles is zero. Give the coordinate of the point in terms of y.