Work Questions If it takes a horizontal force of 300 N to push a stalled automobile along a level road at constant speed‚ how much work must you do to push this automobile a distance of 5.0 m? W=FΔd F= 300 N Δd=5 m W=(300)(5) W=1500 J In an overhead lift‚ a champion weightlifter raises 254 kg from the floor to a height of 1.98 m. How much work does he do? W=FΔd=Eg Eg=mgΔh m=254 kg Δh=1.98 m Eg=(254)(9.8)(1.98) Eg=49528.62 J W=49528.62 J A child drags a 20-kg box across a lawn for 10 m and along
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K2/K1 = (1 + 1/ρ) v2/u2 = 1/(1 + 1/ρ) ⇒ v = u/2 ‚ K2/K1 = 1/2 . as ρ → 0 ⇒ v → 0 ‚ K2/K1 → 0 e.g. ρ = 1 2) A point mass m swings under gravity from a fixed pivot on a massless cord through an angle θ to collide with a stationary block of mass M. Assuming a fully elastic collision find the distance the block will slide if the dynamic friction is µ. during swing down m acquires speed u: m g Δh = 1/2 m u2 ⇒ u = [2g R(1 - cosθ)]1/2 let ρ = (m/M) then speed of block just after impact is: V = 2ρ2
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The para militarization movement started during the reform era to correct some of the issues that came to light throughout the political era. In order to professionalize policing the pendulum needed to swing from corruption to a structured environment and the military model was needed to correct some of the deficiencies of that era. Although the para militarization has a number of rational explanations for its implementation‚ there are a number of drawbacks or problems associated with it application
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You’re not important. You’re not anything.” Granger is talking about how utterly insignificant Montag‚ and all human beings for that matter‚ are in the long scheme of time. He continues by saying: “But even when we had the books on hand‚ a long time ago‚ we didn’t use what we got out of them. We went right on insulting the dead. We went right on spitting in the graves of all the poor ones who died before us.” Quite evidently‚ Granger is remarking on how important it is to relish the little moment
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looks up and sees a funny object floating above him but and it gets closer he realizes that it is a pendulum. He tries to wither himself free. When this fails he begins to think. He realizes that if he rubs what is left of the meat on the cords that are around his body the rats will come and eat the ropes. So he does just that. When he is free he ducks out of the way. After a few more swings the pendulum just stops and raises out of sight. He realizes that someone has been watching him. He falls asleep
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Piaget’s Theory Cognitive Development Process From a baby to an adult‚ the mental of human are changing continuously due to the demographic (age‚ gender‚ and education) and environmental factor (family influence and society influence). There are many types of cognitive development theory that use to prove the human’s mental stages of changing. In cognitive development theory‚ the theory that is focused on is Piaget’s theory of cognitive development. Piaget’s theory‚ which is the children cognitive
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being a critical management skill. And although there is still fear and prejudice around the subject‚ it has become clear that the businesses which do not learn to be more flexible and creative will fail. We all know that business is cyclical. The pendulum is swinging – and now the world’s most systemised companies are working hard (and fast) on re-injecting the innovative thinking and creativity that their systems had previously squeezed out. Since he became CEO of General Electric in 2001 Jeff Immelt
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balance towards the South‚ ensuring a greater number of pro-slavery representatives in Congress and securing the political power of slavery. On the other hand‚ adding more free states would empower anti-slavery positions and make the political pendulum swing towards the granting of abolitionist
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The ROTC-Campus relationship and its causes Introduction ROTC has recently returned to many university campuses including the Southern Oregon campus. In a four year time span‚ the SOU ROTC program has expanded its cadet pool from single digits (Mail Tribune 2009) to just over thirty (SOU 2013). This has potentially created a problem; students all have very different life experiences that may or may not have included interaction with the military. On the SOU campus‚ my talks with many students
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Scientific Revolution. As a physicist‚ mathematician‚ astronomer‚ and philosopher‚ his contributions include improvements to the telescope and consequent astronomical observations and support for heliocentrism. He also conducted experiments with pendulums‚ establishing the relationships between length and period. He also applied these principles to gravity‚ determining that objects fall at the same speed regardless of their comparative masses. His persistence in investigating and testing natural
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