“When an object falls, it gains both speed and kinetic energy. The increase in speed is proportional to the distance traveled: if the distance that an object falls doubles, its speed will also double.” A Physics Lesson by Brian Kross. “The object’s kinetic energy is proportional to the square of its speed.
This means that an object will have four times as much kinetic energy if it doubles in speed.” “We can use this equation for calculating how far and fast an object falls: “Kinetic Energy = ½ Mass x Acceleration”. The units are usually given in joules (J).” “This equation is often written as “KE = ½mv²”, where m is the object’s mass and v is its velocity (speed).” The second law of motion states that an object will always come to a stop. It may slow down or speed up, but objects have never been observed with negative kinetic energy. The only exception would be if there was friction slowing it down. This means that when you drop something off your desk, it doesn’t just keep going forever.”