A balloon is ascending at a rate of 4.00 m/s to a height of 11.0 m above the ground when a package is dropped. The time taken, in absence of air resistance, for the package to reach the ground is
A) 1.96 s.
B) 1.14 s.
C) 2.75 s.
D) 1. 50 s.
E) 0.364 s.

Question

Quizplus · Accepted Answer

The package is initially moving upwards at 4.00 m/s and is 11.0 m above the ground. Using the kinematic equation $ h = v_i t + \frac{1}{2} g t^2 $ where $ h = -11.0 $ m (since it falls to the ground), $ v_i = 4.00 $ m/s, and $ g = 9.81 $ m/s², solving for $ t $ gives approximately 1.96 s.

A Balloon Is Ascending at a Rate of 4