Why does it hurt your hands when you carry heavy shopping in carrier bags?

2 answers:

8 0

I think it is when the plastic is wrap tight in your hand it makes them fell sore

8 0

It hurts your hands because the handle of the carrier bag cuts into your skin

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notka56 [123]

Could it be "Scientific research"?

5 0

3 years ago

kvasek [131]

Answer:

Because the force one needs to apply is reduced.

Explanation:

Work = Force × distance

To be more precise, the selection of these two parameters should be in a manner that the distance is what the line of action of the force traces.
It is obvious that for a given amount of work when one parameter is changed the other changes to counteract the change of the first one.
Imagine the situation shown in the attached figure. The amount of work that needs to be done during the lifting of the mass to a height of $\small h$ vertically is $E = mg\times h = mgh$ .
On the slope, however, one needs to push the object an $L$ distance up to get the object to that $h$ height ultimately.
The work he does on the slope is $mgh = F\times L$ and since $L > h$ , $F < mg$ .
The force that needs to be applied is less than that applied in the vertical lift. Hence it feels easier. #SPJ4