A bus is traveling North at a rate of 20 m/s. A student stands up and walks toward the front of the bus (North) at a rate of 2 m/s. What is the resultant velocity of the student?
A. 10 m/s north
B. 18 m/s south
C. 22 m/s north
D. 40 m/s north
pls explain too bc i don’t get it

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.