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# A ball falls out of an airplane window. the airplane is 500m above the ground. find the kinetic energy and spe?

A ball falls out of an airplane window. the airplane is 500m above the ground. find the kinetic energy and speed of the ball right before it hits the ground?

### 2 Answers

- JohnLv 78 years agoFavorite Answer
From your problem statement it sounds like you're only interested in the vertical dimension, and you also need to neglect the effect of aerodynamic drag.

With these assumptions, right before the ball hits the ground it has converted all of its potential energy to kinetic energy. Potential energy (PE) = mgh, where m = mass, g = gravitational constant, h = height.

To find the velocity, you equate the kinetic energy right before it hits the ground to the starting potential energy it had at 500 m. KE = 0.5 * m * v^2. Equating the two, you get v = sqr root (2gh).

- 8 years ago
Well to solve the equation you have to f. Once you have completed that, you add that to f. Take that total, and subtract it from f. Times f by f. then you will have to divide f by f

Source(s): f