Home › ICSE Class 8 › physics › Force and Pressure › Why do straps of a heavy bag bite into the shoul…
Why do straps of a heavy bag bite into the shoulders if they are thin?
AStraps are sharp by common convention
BThey contain magnets
CForce per area is high because area is small
DThey are made of wool
Answer & Solution
Correct answer: A. Straps are sharp by common convention
1. The bag's weight acts on the shoulders through the straps.
2. Thin straps mean a very small contact area.
3. With the same weight, pressure is high.
4. High pressure causes pain on the shoulder skin.
5. So thin straps cause discomfort due to high pressure.
_Source: Selina Concise Physics ICSE Class 8, Ch 3 'Force and Pressure'_
Related questions
The instrument used to measure atmospheric pressure is the:Atmospheric pressure on the human body is roughly 100,000 Pa. Why don't we feel crushed?Friction acts:Action and reaction forces:Why are dams built thicker at the bottom than at the top?A camel can walk easily on desert sand because:Pressure at the bottom of a tall water column compared with a short column:Why is it easier to break a watermelon by pressing a needle than by pressing the palm?