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First of all, I will tell you the quick and easy way to find the answer. The equation is 9.8 multiplied by 5. You always use the number 9.8 because that is the measurement of Earth's gravity. You use the number 5 because that is the mass of the object you are measuring. That number changes depending on the object's mass.

A 5kg backpack would weigh 49 Newtons on Earth. Good luck with science or whatever you needed this for!!

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Wiki User

11y ago
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Wiki User

12y ago

It weighs 49.3728 newtons. Trust me I got it right on my test.

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Anonymous

Lvl 1
3y ago

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Q: How many newtons does a 5-kg backpack weigh on earth?
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