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Could someone please help with this rudimentry calculation. I need to know the difference in the energy at impact between the following two scenarios.

1) 2 lbs falling under gravity from 8 feet with an impact area of 12 mm.

2) 4 lbs falling under gravity from 4 feet with an impact area of 4 mm.

Many Thanks

1) 2 lbs falling under gravity from 8 feet with an impact area of 12 mm.

2) 4 lbs falling under gravity from 4 feet with an impact area of 4 mm.

Many Thanks

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