Question

Trials with which two sets of experimental conditions would allow an experimenter to determine the effect of increasing egg mass upon the force experienced by the egg? (select exactly two)

Answer 1

The first and second one.

Size small drop height 5 meters landing surface 1-inch foam

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Size large drop height 5 meters landing surface 1-inch foam

Since the experiment want to observe how a difference in mass (~size) can affect the force experienced by the egg

It means that the only thing that should change is the size and keep the other point of measure the same