Astudent holds a bike wheel and starts it spinning with an initial angular speed of 9.0 rotations per second. the wheel is subject to some friction, so it gradually slows down. in the 10.0 s period following the inital spin, the bike wheel undergoes 65.0 complete rotations. assuming the frictional torque remains constant, how much more time δ t s will it take the bike wheel to come to a complete stop?

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.