Problem 8. A helicopter carrying mailbags is moving upward at 5.00 rn/s when it loses a mailbag. If the helicopter is 1.00 x 103 m above the ground when the mailbag is lost how long does it take to hit the ground? Ignore air resistance. a. What is the motion of this object? (1 point) 1. Vertical only 2. A component of vertical motion and a component of horizontal motion 3. Horizontal only b. What external forces on the mailbag (forces on the mailbag from outside the mailbag) exist? (1 point) 1. Weight only 2. Weight and other external forces 3. No external forces at all c. For what variable can we get a number that isn't directly given to us (hidden information) (1 point) d. What kind of problem is this? (2 points) e. What equations exist for this type of problem? List them all (there are three) (1.5 points)