The correct answer is option D. When an object falls with no air resistance.
What is the speed of an object when it falls?
Accelerates when falling
Gravity increases the speed at which objects fall to the ground and increases the fall time. In fact, the velocity increases by 9.8 m / s2, so one second after the object begins to fall, the velocity becomes 9.8 m / s.
The amazing observation that all free-fall objects fall at the same speed was first proposed by Galileo almost 400 years ago.
To find the velocity (or velocity) after a certain period of time, simply multiply the acceleration by gravity by the time after it is released. Therefore, it looks like this: Speed = -9.81 m / s ^ 2 * hours or V = gt. A negative sign means that the object is moving.
Learn more about air resistance here: https://brainly.com/question/1385438
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