Question

1. Parachute jumpers land with an average vertical velocity of 5 m/s. With what height of ordinary jump does this compare?

2. A ballast bag filled with sand is dropped from balloon. The observer noted that the bag struck the ground 6 s after its release. If air friction is disregard, how high was the balloon above the ground?

3. A stone is dropped in still air from the deck of a high bridge. The sound of the splash reaches the deck 3s later. If sound travels 342 m/s in still air, how high is the deck above the water? (This requires the solution of a quadratic equation)

Answer 1