The ball fell to the ground from a height of 80m. Determine how long the ball was in flight.

As we know from the school physics course, in order to calculate the time that the body will be in flight under the conditions indicated in the problem, it is necessary to use the following formula:

t = √ (2S / g).

Let us determine what value will be equal to the time that the given ball spent in flight, when from the condition of our task we know for sure that it was dropped from a height, which is 80 meters:

t = √ (2 * 80/10);

t = √16;

t = 4.

Answer: Under these initial conditions, the ball will be in flight for 4 seconds.