A hot air balloonist rises vertically with a constant velocity of 6.0 m/s and releases a sandbag at the precise instant when the balloon is 40.0 m above the ground.
a) calculate the position and velocity of the sandbag 1.0s after it is released.
b) what is the time when the sandbag hits the ground?
c) what is the maximum height above the ground the sandbag reaches as it is in freefall?