One way is to try and falsify the equivalence principle, to show that the two phenomena of gravitational and inertial mass are not really identical.
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As its mass increases, so does its gravitational pull.
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Another theory suggests that material surrounding a young star can undergo gravitational collapse under its own mass.
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The coil is suspended in an external magnetic field and the current running through it adjusted so that the attraction between the two magnets balances the gravitational force on the suspended mass.
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Its mass is also miniscule, so that the gravitational pull on its surface is just 6% of that on Earth.
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Weight and mass are not equivalent as weight can change with gravitational changes.
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