Question

. The photo shows physics teacher Marshall Ellenstein walking barefoot on broken glass bottles in his class. What physics concept is Marshall demonstrating, and why is he careful that the broken pieces are small and numerous?
@Abhisar

Answer 1

couldn't find the photo

Answer 2

is this to show that if you distribute even force you will not lacerate your feet to death? because you are distributing your weight evenly?

Answer 3

U r close

Answer 4

This demonstrates the concept of PRESSURE which is by definition the total force divided by the surface area on which the force is applied. If the glass pieces are numerous and small the total contact area between the foot and the glass is bigger. Since the force is the same (equal to the weight of the teacher), then the pressure on glass will be smaller and therefore the broken glass will not puncture the skin of the teacher

Answer 5

ah

Answer 6

i see i understand that

Answer 7

like when i walk barefoot down my gravel alley

Answer 8

yep

Answer 9

got it ?

Answer 10

it only hurts if i step on a big rock

Answer 11

i got that one

Answer 12

let's try another

Answer 13

That's because for big rocks contact are is small, this increases the pressure and it hurts

Answer 14

*area

Answer 15

indeed they hurt

Answer 16

yep \(\color{green}{\huge\ddot\smile}\)