Physicist Robert Matthews from Aston University in Birmingham in the UK have found a formula that determines the angular velocity of rotation of the smartphone, dropped from the hands of the owner. It allows you to evaluate the chance of dropping your device on the screen depending on the height from which it dropped.
Fiscalidade the smartphone starts a rotation around one of the fingers. In this case, the center of gravity of the apparatus is located initially below the axis of rotation. This leads to the appearance under the effect of gravity torque, causing the phone starts to move and slip out of your hands.
The smartphone model is a rectangular parallelepiped, and its axis of rotation is parallel to the small side. In the formula for the angular speed of the phone involves four parameters: the length L of the smartphone, the acceleration of free fall g, the initial rotation angle θ and the distance δ (between the center of gravity of the apparatus and the axis of rotation). In the ratio p = 2δ / L. Formula may explain why it falls screen down.
Matthews noted that the person drops the smartphone more often than it is while typing is due to the fact that the center of gravity of the phone is initially below the axis of rotation, the moment of falling under the influence of gravity appears torque, due to which the gadget is turned to flight the screen down. According to physics, in the fall, you can reduce the chance of dropping on the screen, if you hold the smartphone in the center of gravity, i.e. in the middle of the body. The scientist is advised not to experiment with phones, as this may lead to their failure.
Research scientist supported by Motorola, which is engaged in the development of phones with unbreakable screen. According to her, about 29% of smartphone users have phones with cracks on the screens.
