Why do smartphones often break when colliding?

It can be said that the most "numb" feeling for most users of smartphones is that on a good day, they accidentally dropped it to the floor. It's bad to pick up my beloved phone and realize that "her" screen crumbles.

Cause smartphone screen is always broken when collision

However, it is not entirely coincidental that the majority of phone drops mean the screen pool. A physicist recently suggested that he had an explanation for this and it was related to an interesting phenomenon called "butter-baked toast".

The phone tends to rotate when dropped.

Specifically, Professor Robert Matthews - a physicist at Aston University (UK), said that because the way mobile phones are handled, they tend to rotate when dropped . However, the height of the device compared to the ground when we hold is often not enough for it to "land safely" , meaning the screen flips upwards. In fact, the smooth and pretty looks of smartphones can also be part of the problem.

Illustration.

Professor Matthews said that the way a phone is held in hand and the material it makes also contributes to the increased risk of the screen facing down when falling to 50 - more than 60%."People might think that breaking the screen is not just about luck. But it is possible to blame the physics. Also, those who are clumsy and often grop for their phones are easy. more risk ".

Through analysis, Robert Matthews found: "If the phone is kept loosely on one hand, with the fingers placed below the center of the device, the possibility is that it will rotate around the fingers if unfortunately When leaving the hand, your beloved smartphone turns at a speed determined by a series of factors including: gravity, tilt angle to the ground at the time of falling, the size of the phone and altitude Based on these factors, Professor Matthews has formulated a formula that he thinks can estimate the speed of rotation of the phone when it falls. "

L is the length of the phone, g is the acceleration, p = 2δ / L is the "protruding parameter", δ is the protrusion distance and θ is the tilt angle of the smartphone when it starts falling.