Steel and cork balls have the same mass. Compare the forces of gravity acting on them.

At first glance, it may seem that steel is much heavier than cork, so the choice is obvious, but this is not the case. The force of gravity depends only on the mass and the acceleration of gravity (f-la: F = mg). Since, by the condition, the balls have the same mass, and the acceleration of gravity is constant, the forces of gravity acting on them are equal.



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