Fluif ounces
Airplane, bed, backpack
The mass of a chapter book is unpredictable. Is it hard bound or soft cover? How many pages is the book and what kind of paper is used?
Strap length. Distance from backpack center-of-mass to center-of-tread.
Kilograms, probably.
Net force is 6N
they are about the same. it really depends on the type of backpack or parachute backpack you are talking about.
Mybe the materials on which they use to make a backpack
-- The distance between you and the center of the Earth. -- The amount of mass you're carrying around in your skin or your backpack.
I was crying because I lost my backpack. Can you grab my backpack please? I stuffed the book in my backpack.
a see through backpack
When you get to the right rank, you get the backpack as a reward. The backpack is permanent (and free).