Consider this situation: A team of landscapers pull an
unplanted tree across the lawn. Of the forces listed, identify
which act upon the tree.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

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.