physical science

A kg ball of lead rests next to a 10 kg rock. which statement below is true:a:the lead ball and rock have the same amount of inertia,b:if the lead ball and the rock fell from the same height in a vacuum, the rock would hit the ground first because it is less massive,c: on the moon both would have the same mass as on earth,but not the same weights as on earth,d:because the lead ball has a larger mass than the rock,it will definitely have a larger volume than the rock

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