Aperson standing on a horizontal floor is acted upon by two forces: the downward pull of gravity and the upward normal force of the floor. these two forces a. have equal magnitudes and form an action-reaction pair. o b. have equal magnitudes and do not form an ac n pair 0 c. have unequal magnitudes and form an action-reaction pair. 0 d. have unequal magnitudes and do not form an action-reaction pair

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.