# A test rocket is launched vertically from ground level (y =

A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of How long did the burn phase last?A rock is projected upward from the surface of the moon, at time t = 0.0 s, with a velocity of The acceleration due to gravity at the surface of the moon is When does the rock reach a height of 180 m above the moon’s surface?An asteroid is traveling in a straight line at a constant speed of 327 m/s. How long will it take for a displacement of 732 km to occur?