susie and Mark perform an experiment to determine how gravity affects falling object Susie uses a small ball in the spam at Walmart kisses a piece of Styrofoam that has the same mass as a ball Susie and Mark drop their objects at the same time from the same height but the ball reaches the ground press in theory since the objects have the same mass they should reach the ground at the same time so which of the following factors is affecting the force of gravity on the objects