Friction acts in a direction
to an object's direction of motion. helpp plz

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

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.

Compare the patterns of the two waves shown in the image. which statement is true about these waves?