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What do you think of this first video?

Was the video real or a fake?

Was it a regulation golf ball or was it atypical?

Slow Motion Video 2 from USGA:

Now let's look at another slow motion video.

Now what do you think?

To begin, let's explain elasticity.Here is the relevant academic definition of Elasticity:

     "the capability of a strained body to recover its size and shape after deformation"

The Modulus of Elasticity is defined as:

     "a mathematical description of an objects tendency to deform elastically (temporarily)"

     The formula is:          Stress / Strain

Elasticity should NOT be confused with the ability of an item to be stretched or deformed. For instance, Play-Doh can be stretched very easily but it does not return to its original shape. Therefore, Play-Doh is more inelastic when compared to steel.

It is difficult to determine which of these golf-balls is more elastic because it appears that they will both return to their original shape given the impacts depicted. However, the first ball deforms more so it is the odds-on favorite for being more elastic.

Given the disparity between the deformations shown, it appears that the first ball is made of a different material or combination of materials. Furthermore, we do not know exactly how fast the balls are traveling at the point of impact so there may be some additional variation as a result.

We suspect that the first video was made for effect while the USGA created the second video to dispel misconceptions. This is just a theory.