a) Find the gravitational force between a 55kg woman and a 75kg man when they ar
ID: 1627883 • Letter: A
Question
a) Find the gravitational force between a 55kg woman and a 75kg man when they are 16m apart. b) Find the gravitational force between two electrons. M_ = -9.11 times 10^-31 kg a separated r = 1.0cm - 0.01m. Compare this with the repulsive electrical force between two electrons, F = 2.3 times 10^-24 N. Find the acceleration of gravity on: a) a neutron star of R = 12km and M_ = 1.99 times 10^30 kg: and b) the asteroid Ceres, with radius R = 470km and M_ = 1.2 times 10^21 kg. A small, uniform sphere of mass 0.100kg is located on the line between 500kg and 10.0 kg uniform spheres. (See Figure 1.) The small sphere is 4.00m to the right of the center of the 5.00kg sphere and 6.00m to the left of the center of the 10.0kg sphere. What is the magnitude and direction of the force on the 0.100kg sphere? 1. The mean distance from the Sun to Jupiter is R = 5.2AU. What is the period of Jupiter's orbit around the Sun? 2. A car of mass, m = 1550kg, can reach a speed of 60mph (26.8m/s) in delta t = 7.ls. What is the average power needed to accomplish that?Explanation / Answer
2)
a)
acceleration due to gravity on neutron star is given as
g = GM/R2
g = (6.67 x 10-11) (1.99 x 1030)/(12000)2
g = 9.22 x 1011
b)
acceleration due to gravity on asteroid is given as
g = GM/R2
g = (6.67 x 10-11) (1.2 x 1021)/(470000)2
g = 0.362
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