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## Homework Statement

A balloon is flying directly upward with a constant velocity of 6.0 m/s. When it reaches 145 m above the ground, a package is thrown horizontally at 4.5 m/s with respect to the balloon.

How many seconds after being launched will the package hit the ground?

## Homework Equations

One dimensional constant acceleration kinematics equations.

## The Attempt at a Solution

I know how to solve the problem mathematically, but my only issue is whether or not to include the vertical velocity (of the balloon) as the vertical component of the package's motion. If I do this then the package's initial velocity would be at an angle. If I don't include the balloon's motion, then the package would have only a horizontal initial velocity.

Is my thinking correct? Do I include the upward motion of the balloon?

Thanks in Advance.