Aprojectile is fired horizontally from a gun that is 45.0m above flat ground, emerging from the gun with a speed of 250m/s? how long does the projectile remain in the air? at what horizontal distance from the firing point does it strike the ground? what is the magnitude of the vertical component of its velocity as it strikes the ground?

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.