I work in a grocery store and sometimes after like 30 mins of being idle one of the apples or potatoes in a pile will roll down. HOW?!??
In: 1
due to the things you do not see:
a) steadily built up of pressure, up to the point were friction is overcome
b) small movements, vibrations of the surrounding (like steps, a truck moving by on the road, even a barely noticeable earthquake) you do not sense – the apple on the other hand does
c) deformations in the product itself that was compensating the pull of gravity up to the point, were it cannot deform any more but has to move
Latest Answers