What is the density of foam

the density of foam is pounds per cubic foot.

Explanation:

In the case of foam, it is measured in pounds per cubic foot (PCF). In other words, the density of foam is expressed by measuring the weight of a single cubic foot of foam material. As an example, consider a foam layer that weighs 100 pounds and measures 25 cubic feet in total.

got this bottom part from google.

the bal will not change its velocity.

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