Why does a roll of pennies weigh more than 50 loose pennies?

Question

Why does a roll of pennies weigh more than 50 loose pennies?

Answer 1

The only difference in weight is the paper the roll is wrapped in. Otherwise they weigh the same.

Answer 2

Because the weight is more concentrated when it's compacted in a roll. To hold 50 pennies, you'll probably have to use both of your hands, giving to the illusion that the roll weighs more.

Answer 3

Because it includes the weight of the wrapper.

To one answerer:  how could packing them tighter possibly make them heavier?  That's like saying, "My luggage weighs 60 pounds.  I wonder if I roll it up real tight I can get it down to 50 pounds?"

Doesn't work that way, does it?

Edward's a lucky guy, anyway.

Answer 4

Because of the paper, or it might be because they are all tightly packed together, so it makes a greater weight, or mass

Answer 5

The United States cent (also known as a penny) weighs 2.5 grams.  Therefore, fifty of them weigh 125 g.

If you put them in a roll, they weigh 125 g, plus the weight of the roll (which is probably less than 1 g).