Question

What type of force does a backpack exert on the body’s back and hips?

Answer 1

It puts pressure on them causing your back to hurt and to shift all the wheight on your hips

Answer 2

I believe the answer is: compression

Compression refers to a type of force that pressed a person or an object inward, causing it to become more compacted. If this type of force happen to our spines on a constant basis, over time our back bone would start to succumb to the force and bent over forward to accommodate the weight.