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物理 高中

第六題

| t 8 功力監什禾 (c)6戶 (CD》%F *些哇帶電量較天的乙, 全 CA》2丘一CB》4戶CC)6戶CCDS反 GCEDA2戶 人只號人所5 CGSyRN補人 人 > 4. 有呢重力的敘進,下和烈何老錢蜈? Ni SA (2當以人7 參 來表示,式中重力當 請 同 2. MR (0田以說明月球何以繞地球運行而休堅北 到只 (@何以說明為何蔡果會趕闊地區 KAY 太喝受到的地球引力, 、與地于受至太吧的戰力如罕 @ GayB ,所受全到心引力信代心。 ccy. 昌定,是以它維妃你下球 Mo 功利負僅 。 G W 3要估同力。器多到誠變歐臣王、電生條多 介程。 唱僚吧一種隻柑交互共中 于妃名革 See. 要人贍馬力? (A)靜電力“(GB)強核 (c)電磁力 (GD)重力 GSy)吧煽力。 畫,分品放置繼電堅 3d 屆 Ad 6亡N 凶險 (@ 在人2林0人多 : 谷嫖苹。d抒受元電力之含旋生生 公分全AA 給 今將另一帶電量4 的點電蕉放置於哪罷 之、 y 主2 0 2二4 (092 (GCD) x三6 (5》 x汪% 7. 有關「強核力,」 的化信, 克列歸若正匯? 選科 喇 (^)為庫命首先提出 (GB)遵守與距離平方反多的熙你 (c)兩冰塊間緊密結含熙 。甘你馬力點 ~Gp)強核力的作用範革很大 (品原子核內質子之國的東鍋須低化只官2 1 衛是,依 2011 年誠位攤地只條還S 六 s. 我國福衛五號(FORMOSAT 5) 際線作軍轉,主要是四哪一竹交九估有 (A)重力_(B)電磁力 AU 導別坊力 再戰鬼還林 龍騰文化

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物理 高中

第10題 A.B選項為什麼一樣Q.Q

27 8, 一擺胡為之單攏髦於 o 點,其擺錘質量為m'被1 1 當擺藉與水平成 30 度夾角時、, 擺線的中點補 卜釘卡1 則繼續掉落。、見右圖。當擺鍾擺至最低點時,恰碰上一個靜止於站 / | 滑地而,質量也是 m 的 小球。假設擺鍾與小球作一維之完全彈性 ) | 失,試問: | (10) 當擺線卡在小釘前一瞬間,擺鍾的速率 人 衫線上的張力為何 ? 人@肪小球 | 昕 2和 2) 當 0) 當攏線下落至最低點,且碰上小球的前一瞬間,擺錘的速 線上了 6) 當擺鍾碰上小球後,若擺鍾不觸及地面, 划隊 繼」 區 的張力又為 何, 7 劉 U 2全 2 2 沁 % / 折= 下 動=h0 [2015 汪 ma | : 2//一個皮球從高度 處自由8 下到地面後又反夷跳起,設急略所有的摩榨效應 ,過二 er (多選) (這是一個週期運動 還 個簡諧運動 ( 寢 H (0皮球的動能與重力位能之和在 便時刻均相同 )在運動期間內,皮球動量之大, 當數 飼 吻于用全及全 和 皮 由 生 昌 JQ 質量為2m、內側直徑為d 的圓環平放於光滑桌面上。 es mm的 小球從圓環中心以初速 人 發射出去,設小球與圓環之間做彈性碰撞日環 的內側光滑。下列敘述中那些是正確的? (多選) (9第一次碰撞前, 而環與小球系統的學以速度為 鄧_(B)第一次碰撞後及第二次碰撞前,環 與小球系統的質心速度為 W/3N/ G第一次碰撞後及第二次碰撞前,圓環 的速度為 人 (0第一次碰撞後及第二次碰撞前,小球的速度為ww/3 全,体 讓 婦: 人 3d/vo 【91 大考公考] Vs 3wfw ~ 2 謂 ‧ 弦 中 人 X20. 和 0

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物理 高中

18題,感謝

10. [2D and 3D motion] Show that the potential energy U(r) ofFa particle of nass jat aa distance r(> 員 from a planet of Inass 4 and radins 戶話 11. [The cross product] Caleulate the cross product A x B, assuming that A and B both lie in the x-y plane and have the respective nonzero components 4,, 4, and 妖,, 且, 12. [Angular momentum] Show that 主r, the instantaneous position ofa particle of mass mu with respect to a certain origin O, is parallel to its acceleration dv/吧, then the time Tate of change of the angular Inoimentum L with respect to the given origin vanishes 13. [Theorem 了 Show that the torque-angular momentum formnla _箇 7二 is also valid for a two-particle system 放 the origin lies at the center of mass 14. [Theorem IIH] Two particles of respective Inass ml and 2 are connected to the ends of amassless rod and Inove in the uniform gravitational field g ofthe earth. (a) What is the acceleration of their center of nass Telative to a Newtonian origin O? (b) Show that the angular Inomentum of the two particles about their center of nass 生 aconstant of the motion. 15. [Moments of inertia] Calculate the moment of inertia ofathin, uniform rod of mass m and length / about an axis perpendicular to the rod and at a distance q from one end. 16. [Rotation about a fixed axis] Consider the rotating cylinder in Figure, and suppose that A7 sg, Fo 三 0.6 Nt, and @ 二 0.2m, Calculate (a) The torque 7 acting on the cylinder (b) Ti ngular aceeleration q of the cylinder 17. [Work and kinet: instant Totat eenergy] A 40-kg homogeneous sphere of radius 10 cm is at acertain about ashaft through its center at 600 rpm. Assuining that a constant fric itude ets so that the sphere comes to rest in 10 seconds, Calculate th tional torque ofthis torque. 18. [The physical pendl end and allowed to oscillate freely in a horizontal plane (see Figure) m] A uniform Tod of Inass ru and length / is suspended at one (a) What is the period of this physic lpendulum for small amplitudes? (b) Ithe velocity u0 of the mass ce Hulum is initially released at rest in a horizontal position。what is the er at a subsequent instant when the Tod is vertical? (ec) Calculate the vertical and the horizontal components of the force on the rod at the point of suspensic 19 and rotations] Analyze the motion of a homogeneous sphere of mass 和7 and Tadius dq, which rolls without slipping down a fixed inclined plane of angle # 20. of angular momentum] A Inan has ainoment of inertia 五 about the = axis. He is originally at Test and standing on asinall platform which can turn freely. Ifhe is handed a wheel which is rotating at and has anoinent of inertia 了about its spinning axis, determine his angular velocity 放 (a) he holds the wheel upright, (b) turns the wheel out 9 二 90?, and (c) turns the wheel downward, 9 二 180?. Neglect the effect of holding the wheel a distance d away from the z axis

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