A satellite used in a cellular telephone network has a mass of 2020 kg and is in a circular orbit at a height of 660 km above the surface of the earth.
A) What is the gravitational force Fgrav on the satellite? Take the gravitational constant to be G = 6.67x10^−11 1 N⋅m^2/kg^2, the mass of the earth to be me = 5.971024 kg , and the radius of the Earth to be re = 6.38x10^6m. Express your answer in newtons.
B) What fraction is this of the satellite's weight at the surface of the earth? Take the free-fall acceleration at the surface of the earth to be g = 9.80 m/s^2.

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?