![]() When you put your iPhone in a case that provides even a couple of mm of "give" during a drop, the g forces will be much lower and you will improve the chances of surviving a drop on a hard surface very significantly. You should always set your centrifuge to the correct G-Force. I found a slow motion video of an iPhone breaking - it shows that the distance over which it moves / distorts is significantly greater than I estimated so the g forces will be less: Use the G-Force Calculator below to calculate the force exerted on samples in a centrifuge. Taking the ratio $\frac\approx 6000 g$ - meaning that your 2000 g is a reasonable number. But see video below for a much larger distortion. Newtons law states that the force required to accelerate an object of mass (m) at an acceleration (a) is equal to the product of m and a. For Mass calculator: m W/g (Force / gravity) For Gravity calculator: g W/m(. I estimate that when a phone drops on a hard surface, it distorts by about 0.2 mm - based on observation of the small dent on the corner when my wife did in fact drop her phone. For weight force Calculator: W mg (mass x gravity) Its weight equation. rpm Rotation speed, rotations per minute. The g force rpm conversion formula is as follows: RCF 1.118 10-5 r (rpm)2. RCF is positively related with the rotor radius and the rotation speed of the centrifuge. Let us assume that the force of gravitation Fg exists between them. There may be a factor 2 there depending on whether you assume a constant decelerating force (crushing bubble wrap) or an elastic deceleration (where force increases with displacement). G force refers to Relative Centrifugal Force (RCF). Consider that two masses M1 and M2 as shown in the figure are separated by a distance R. This approach is the same as used in this article describing a 'bubble wrap drop' Mythbusters experiment. In the calculation below, the G force of a Washer Extractor can be. This is based on a simple work done argument - $F_1\Delta x_1=F_2\Delta x_2$, and of course $F=m\cdot a$. Calculation of the G Force, starting from RPM and radius of the Drum. As a rule of thumb the "g force" of an impact is the ratio of the distance of the fall, and the distance it took to stop falling. How do you calculate the accelerating / g-force of a screen deck To do this, you will need three pieces of information: Number of poles of the motor Stroke of the screen (measured) Frequency of the current to the motor From the number of poles of the motor, the moto's shaft rotational speed can be calculated, using the following formula: w (2 X 60 X f) / n where: w shaft rotational speed.
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