Barron's AP 物理C

內(nèi)容概要

　　備考指南　考點(diǎn)透析
　　1套診斷測試助您認(rèn)清強(qiáng)弱項(xiàng)
　　2套全真測試題幫您考前熱身

作者簡介

作者：（美國）佩爾科維茨（Robert A. Pelcovits Ph.D.） （美國）法卡斯（Joshua Farkas M.D.）

書籍目錄

巴朗五大要點(diǎn)提示
緒論
診斷測試
基礎(chǔ)知識
一維運(yùn)動學(xué)
二維運(yùn)動學(xué)
牛頓定律
功、能量和功率
線性動量和質(zhì)心
轉(zhuǎn)動運(yùn)動學(xué)、力、功和能量
轉(zhuǎn)動慣量、平衡和轉(zhuǎn)動/平衡的結(jié)合
簡諧運(yùn)動
萬有引力
庫侖定律和點(diǎn)電荷產(chǎn)生的電場
由連續(xù)電荷分布產(chǎn)生的電場和電勢的計(jì)算
高斯定律
飽含電池的電阻電路分析
……

章節(jié)摘錄

版權(quán)頁：   插圖：   彈性、非彈性和完全非彈性碰撞 1. In an elastic coil&ion, kinetic energy is conserved. Whatever kinetic energy isspent deforming the objects as they collide is completely recovered as they sep-arate (the energy is only temporarily stored as a compression of the objects). 2. In inelastic collisions, kinetic energy is not conserved (some is used toproduce heat, sound, or permanently deform the objects, all of which are non-conservative processes). 3. In a totally inelastic collision, kinetic energy is also not conserved, and the twoobjects remain stuck together after the collision. 碰撞問題的解法 First, you must decide whether the collision is elastic or inelastic. If the problemsays that the two particles end up stuck together, it is by definition totally inelastic.Otherwise, the problem generally tells you whether the collision is elastic or (equiv-alently) whether kinetic energy is conserved. When the collision is elastic, you can construct equations based on the fact thatboth linear momentum and kinetic energy must be conserved. If the collision isinelastic, you can use only the conservation of linear momentum. The following are extra problem-solving tips: 1. If the collision is totally inelastic, the objects share a common.final velocity(because they are stuck together). 2. Remember that momentum is a vector, so if the collision occurs in more thanone dimension, the conservation of the momentum vector will be equivalentto a set of two or three one-dimensional equations. 3. If the problem allo~vs you to calculate the change in kinetic energy during thecollision, you can use a modified conservation of energy equation (such as△KE = KEfr - KE0) to solve an inelastic collision. 4. When you think of a situation where linear momentum is conserved, you prob-ably think of a collision involving "contact forces. However, momentum is con-served even when forces act at a distance (such as gravitational forces orelectrostatic forces), as long as there are no net external forces. For example,the momentum of a system of planets, which attract each other gravitationally,is conserved.

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《出國留學(xué)書系,SAT、AP備考書系:Barron's AP 物理C(第3版)(英文)》由世界圖書出版公司北京公司出版。

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