The work done by the frictional force can be calculated by multiplying the magnitude of the force of friction by the distance over which it acts. This can be represented by the equation: W = Ff x d, where W is the work done, Ff is the force of friction, and d is the distance over...
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a当转动力矩和摩擦力矩、流体阻力矩平衡时叶轮转速稳定,在一定条件下叶轮转速与流体流速成正比 When torque and friction moment, fluid moment of resistance balance the impeller rotational speed is stable, the impeller rotational speed and the rate of flow of fluid is proportional under the controlled condi...
A {eq}45\:kg {/eq} boy slides from rest down a {eq}3\:m {/eq} tall slide to ground level. When at ground level he is traveling at {eq}5\frac{m}{s} {/eq}. How much work was done by non-conservative forces on the boy from the friction of the slide?
It would be of great interest to establish equations to calculate these strains, especially as they can be used to calculate wear via a low cycle fatigue rule [3, 5]. This work provides empirical equations to calculate friction and plastic strains left behind the sliding cylinder. To relate ...
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The energy loss in pipe flow due to friction can be expressed as a pressure drop instead of as a head loss. Chemical and mechanical engineers often work with pressure drop, whereas civil engineers usually work with head loss. The relationship between frictional head ...
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pulled it, in a never-ending cycle. In the real world, the spring would not be ideal and its material would eventually lose its elasticity, but more importantly, friction in reality is unavoidable; its net force soon reduces the magnitude of the oscillations, and the block returns to rest....
Calculate the energy difference between the ms = 1 2 ('spin up') and ms = - 1 2 ('spin down') levels of a hydrogen atom in the 1s state when it is placed in a 1.45-T magnetic field in the negative z@direction. Which level, ms = 1 2 or ms =...