求解🙏🏻

挑戰一:某連隊等速直線前進,部隊全長 600m,傳令兵自隊尾等速跑到隊首遞交報告給連長後, 立刻以原速率跑回隊尾,此時整個連隊恰好前進了800m,則全程傳令兵移動的路徑長為?/boom # A popular web video shows a jet airplane, a car, and a motorcycle racing from rest along a runway. Initially the motorcycle takes the lead, but then the jet takes the lead, and finally the car blows past the motorcycle. Here let's focus on the car and motorcycle and assign some reasonable values to the motion. The motorcycle first takes the lead because its (constant) acceleration am 8.40 m/s² is greater than the car's (constant) acceleration ac 5.60 m/s², but it soon loses to the car because it reaches its greatest 58.8 m/s before the car reaches its greatest speed 106 m/s. How long does speed the car take to reach the motorcycle? 16.6

想請問這四題

98. A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of the ball during this interval is: 4.9 m 2÷2=1 XA) B) C) D) E) 7.4 m 19.4 m 38.8 m 19.6 m 122. DA If the x component of a vector A, in the xy plane, is half as large as the magnitude of the vector, the tangent of the angle between the vector and the x axis is: A) √3 B) 1/2 C) √3/2 3/2 D) E) 3 142. Two vectors lie with their tails at the same point. When the angle between them is increased by 20° the magnitude of their vector product doubles. The original angle between them was about: A - B = |A|| B|cos O 2 L² cose = L² cos (0+20²) 2005 = cos@casso. sing sino A) 0 B) 18° C) 25° D) 45° E) 90° BA 158. Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true? A) III only B) I and II only - 0-9 cose-adsint I. The horizontal distance traveled by the bullet is greater for the Moon. II. The flight time is less for the bullet on the Earth. III. The velocities of the bullets at impact are the same. I and III only II and III only 1.1 cos@=-035n9. tant = 1/3 C) D) E) I, II, III h-Vortat² xoxt-txt tu-Jite

啥🥲

What is the moment of inertia I for a uniform ring of radius R and mass M about an axis (perpendicular to the plane of ring) at its rim? (A) 0.5 MR2; (B) MR²; (C) 1.5 MR²; (D) 2 MR²; (E) None.

［高二 牛一］ 請問這一題的D選項：雨傘的水滴那個不是會飛出去嗎？為什麼這個不會呢 謝謝

C/ (BS D3 下列有關慣性現象之敘述,哪些正確? 19 (Alt半球的長程大砲往正北方發射時,將命中其正北方的目標物 (B)北半球的 長程大砲欲射 中正北方的目標物時,應朝北偏西發射 (C)不計 空氣阻力,有一 等速飛行的飛機連續丟下一批彈,則雷達所掃描到飛機與 炸彈的影像,恰成 一直線 (D) 乾冰圓盤靜置於一靜止轉盤的邊緣,因兩者間無摩擦,故當轉盤開 始旋轉時,乾水盤沿切線飛出(E)馬戲世界內的騎師,在奔馳的馬背上躍起, 因慣性作用又會落回馬背 ea plane CE 9 Bomb. 多

我的物理要完了！希望大家能來救我！

4 4 有關繞日公轉的八人分 J八大行星, 旬 作 信和各h水時 (B)公轉半徑最大的是天王是 AN大行星公轉週期的二 進哪些正確? (應選2項) 的平方與公轉軌道平均半 則八大行星的公轉速率皆相等 (D)公轉軌道結為村圓 1 讓生為傅圖 ,太陽位於每個橢圓軌道的中 同 上 (將晶公轉宙放和連連生 |橢圓軌道的中心 碼質量為 100 公克 ,森 下列哪些結論? (應選3 項) (A)最大靜摩擦力和放置的財碼 碼個數成正比 (B)最大靜摩擦力和物體的重量成正比 (C)最大靜摩擦力與物體所受正向力成正比 (bb表中的九值等於 192 公克重 (B)表中的九值等於 208 公克重。 三、閱讀題 (3題,每題5分,共 15分) 生休碼重作 塊質量為 800 公克。根據1 於木塊,作最大靜摩擦力的測 如圖表所示。已知每個太 數據,小明可以初步得到 【 物體 「最大靜摩擦力 木塊 128gw 和 木塊+1個夸碼| 144gw 未塊33人全天上且76gw ~ 森塊+5個太碼 之疆 在科學研究、網路資通及軍事安全等多重 素下,世界各國無不將 幣 251 億元,預計每年發射 ! 顆衛星升空。 於我國在衛星產業技術上自 主能力的提升 表 衛星技術與衛星產業,視為國力發展的重要指標之一。臺灣在這方面也 未汞人後,自2017 年順利把「福衛五號 」送到太空後接續的「福衛七 號 也在 2019 年升空 下太空科技長程發展計畫」第三期,由科技部國 家實驗研究院國家太空中心執行,自 2019 年起至 2028 年共 10 年,將投 藉由發射次數的國增, 福爾摩沙衛星的歷程及資訊,其中有 大空最準確溫度計 」之 今 >, 即將接替其工作的福衛蕊號也是由6 顆微衛星組 12 分鐘,操控人員要事前規劃好要下的指 控系統是國人首度自主研發,為衛星技術 J3 到4倍,氣象預報準確度將可提高 10% ,

還有這些！

RO 還 se 呈 人 2 人0)用( S 慚誤4 二說 同一抽水幸好面上的站 ! 靜止向前加速前進, 是依靠下列哪一個 0有 (A)地面與輪胎的摩擦力 (B)地面對輪胎的正向力 (C)汽車的重量 (D)汽車傳動軸間的拉力 (E)汽車引擎的推力。 菩[/ 5. 靜止於水平面上的物體, 小而大施加一個水平作用力, 摩 測得接觸面摩擦力與作用力的關係如圖所示。下列敘述 銜2 / 何者錯誤? 2 s GA)由0到和點,均為靜摩擦力 放 (B)由O到和點, 摩擦力漸增 說 作用力Qo (@)由O到和P點, 摩擦力與水平作用力大小相等 (B)由9到及點,均為動摩擦力 (E)由 9到有點,物體作等加速運動。 葵 斷 '在彈作限度內,將一原長為 8公分的輕彈簧砂掛10 公 ee 2 3 0D)4 (BE)3 公交重/公分。f0# 2 人1 7. 承上題,將彈簧改以水平放置,兩敵各施以 20 7 2 、 彈簧的總長為 說 公分。 (A)12(B)14 (C16 (D)18 (EE)20 公

可以幫我看一下我到底哪裡錯嗎？感謝！

、非選擇題 (2 小題,每小題 5 分,共10分) ]. 為了趕赴參加神奈川縣內與 es 櫻木 秒的速度追趕前方 30 公 公尺處的靜止公4 22 車速為 20 公尺/秒後維持等速。則 ~: (1)櫻木花道與公車最接近的距離為多少公尺? (2)由靜止開離 50 秒期間, 公司 2 窗:

麻煩各位幫我解答🙏🙏🙏

四、非選擇題 (2小題,每小題 5分,共 10 分) 1. 為了趕赴參加神奈川縣內與陵南高中的籃球對抗賽,櫻木花道賣力地在直線上以 10 公惟/ 秒的速度追趕前 公尺處的靜正公車, 此店 公車以2公尺/秒的加速度直線離去,直到 居!讓人 讓 守

18題，感謝

18. [The physical pendulum] A uniform rod of mass ja and ]ength / is suspended at one end and allowed to oscillate freely in a horizontal plane (see Figure)- (a) What is the period of this physieal pendulum for small amplitudes? (b) the pendulum is initially Teleased at rest in a horizontal position, what is the vealocity uo of the mass center at a subsequent instant when the rod is vertical? (e) Caleulate the vertieal and the horizontal components of the foree on the rod at the 交合和 古Na

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