A student climbs to the top of the gym and drops a baseball to the ground below. A physics student standing nearby has a motion sensor and determines that the baseball hit the ground with a velocity of 17 m/s. if you ignore air resistance, how long was the baseball falling through the air?

The baseball was falling during 1.733 seconds.

Explanation:

The baseball experimented a free fall, which is a particular case of uniformly accelerated motion, in which object is accelerated by gravity. In this case, we need to determine the time spent by the ball before hitting the ground (), measured in seconds, which is determined by the following kinematic formula:

(1)

Where:

, - Initial and final speeds of the baseball, measured in meters per second.

- Gravitational acceleration, measured in meters per square second.

If we know that , and , then the time spent by the baseball is:

The baseball was falling during 1.733 seconds.

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