When an astronaut experiences weightlessness in deep outer space,  is she at equilibrium?  She may be stationary with respect to her spaceship, and at the same time traveling at a high speed with respect to the stars. Which law of motion offers explanation to this situation? Is she also massless?

7) Two manned satellites approaching one another, at a relative speed of 0.550 m/s, intending to dock. The first has a mass of 5.00 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg.   (a) Calculate the final velocity (after docking) in m/s by using the frame of reference in which the first satellite was originally at rest. (Assume the second satellite moves in the positive direction. Include the sign of the value in your answer.)  _____m/s   (b) What is the loss of kinetic energy (in J) in this inelastic collision? _____ J   (c) Repeat both parts by using the frame of reference in which the second satellite was originally at rest. final velocity (m/s)  _____ m/s loss of kinetic energy (J) _____ J Explain in detail why the change in velocity is different in the two frames, whereas the change in kinetic energy is the same in both.

7) Two manned satellites approaching one another, at a relative speed of 0.550 m/s, intending to dock. The first has a mass of 5.00 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg.   (a) Calculate the final velocity (after docking) in m/s by using the frame of reference in which the first satellite was originally at rest. (Assume the second satellite moves in the positive direction. Include the sign of the value in your answer.)  _____m/s   (b) What is the loss of kinetic energy (in J) in this inelastic collision? _____ J   (c) Repeat both parts by using the frame of reference in which the second satellite was originally at rest. final velocity (m/s)  _____ m/s loss of kinetic energy (J) _____ J Explain in detail why the change in velocity is different in the two frames, whereas the change in kinetic energy is the same in both.

Two manned satellites approaching one another at a relative speed of 0.300 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.