A barrel (mass mLoad) is attached to a massless rope, which is attached to a hook (mass mHook), which is attached to the massless cable of a crane. The cable is accelerating up with an acceleration a. What is the tension of the rope?
1. (mHook+mLoad)·(g-a)
2. mHook·g+mLoad·a
3. mLoad·g+mLoad·a
4. mHook·(g-a)
5. mLoad·a
6. (mHook+mLoad)·(g+a)
7. mLoad·g
8. mLoad·g+mHook·a

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.