這題求說明 謝謝

人。 Vo 2 可不 ia 9 (在水平地面上,將質量為m 的物體以初速,仰角0,斜向拋射出去,自抛出至著地期間的 飛行時間為T,只計重力作用,則:(重力加速度g)) MVogin 9 g (以no 自抛出至著地期間,物體動量變化量的量值為 radio Sty, 方向 <a ( 2)自地出至著地期間,重力對物體作用的衡量量值為Westm3方向何下: 地地 「 (以試利用(102)的資訊,可算出飛行時間為Vosing Ying (myy Ford- g Vo EN Vocoso Vosino a Vosing your Vocable

怎麼寫？ 🙏P單位跑到指數去我就不會了

Dimensional Consistency 1.9 The density of a certain liquid is given an equation of the following form p = ( AT + BT2) eCP Where pis density in g/cm3; T temperature in K; P pressure in atm; and A, B, and C are constant. The equation is assumed dimensionally consistent. What is the unit of B?

急！請問這題怎麼算

ř =(X,Y,Z) T: (X,Y, 2') 元子产 - (2) 11) PR² = 2 ) Z - 7 "g(); 完 -T 几 几 - 元- = (x-X , Y-Y', z-z) 元 TF- force- (-x)+(y-y) 3.7) 元 立-子 立 Ali, i') X-X'

高二物理 角動量 請問左圖和右圖為何答案卻不相同？右圖的力不是也是通過支點嗎？謝謝🙏

甲 > A. 乙 TT 2 運動方向 450F 2 F </d高 do 丁 類題如右圖所示,一質點以為圓心在一 水平面上作等速圓周運動, 甲、乙、丙和丁皆在圓周上,則: (1)若以O點為參考點,質點在甲、乙和處的角動量隨時間的 變化率量值大小關係? 72 7 中 (2)若以丁點為參考點,質點在甲、乙和丙處的角動量隨時間的 變化率量值大小關係 关!是莲度! >>中 > > (1山 山)向力士通过圓u) →力時 20 甲=乙= = 0 T 力臂= -0

21題 教教我QAQ

Section 11.3 Angular Momentum J-s behind rmv a he ur 265 = ? a ter 30. Example 11.1: A 58.1 Iw COMP string and whirled at 18. Express the units of angular momentum (a) using only the funda- momentum of magr mental units kilogram, meter, and second; (b) in a form involving the circular path. Fir newtons; (c) in a form involving joules. marw horizontal and (b) the 19. Use data from Appendix E to make an order-of-magnitude esti- 31. Example 11.2. A stai mate for the angular momentum of our Solar System about the Max 27 the end of its lifetime galactic center. mu = 17.293 of radius 4.96 X 10' 20. A gymnast of rotational inertia 63 kg•m? is tumbling head over heels dwarf of radius 4.21 with angular momentum 460 kg•m?/s. What's her angular speed? 17.99 acted on the core, fine A 660-g hoop 95 cm in diameter is rotating at 170 rpm about its 32. Example 11.2: Astro 22. A 1.3-th-diameter golf ball has mass 45 g and is spinning at central axis. What's its angular momentum? L: 1W=0-66*(0-95) x 140x277.10 km and determin core that collapsed to 3000 rpm. Treating the golf ball as a uniform solid sphere, what's ing with a period of 4 its angular momentum? 18-3 33. Example 11.2. The s 10-598 rpm With her arms outstre Section 11.4 Conservation of Angular Momentum tational inertia is 3.5 23. A potter's wheel with rotational inertia 6.20 kg•m? is spinning (Fig. 11.6b), her rot freely at 20.0 rpm. The potter drops a 2.50-kg lump of clay onto her final spin rate? L = 6 2 x 2-1 = 12-99~13 - 2x2 22 13= 60.48)" x 2.5 W W = 2 . X z W = 20x2T 60 ²2.1 ~ 1 12.574

第21題 到底要怎麼寫ಥ_ಥ

Section 11.3 Angular Momentum J-s behind rmv a he ur 265 = ? a ter 30. Example 11.1: A 58.1 Iw COMP string and whirled at 18. Express the units of angular momentum (a) using only the funda- momentum of magr mental units kilogram, meter, and second; (b) in a form involving the circular path. Fir newtons; (c) in a form involving joules. marw horizontal and (b) the 19. Use data from Appendix E to make an order-of-magnitude esti- 31. Example 11.2. A stai mate for the angular momentum of our Solar System about the Max 27 the end of its lifetime galactic center. mu = 17.293 of radius 4.96 X 10' 20. A gymnast of rotational inertia 63 kg•m? is tumbling head over heels dwarf of radius 4.21 with angular momentum 460 kg•m?/s. What's her angular speed? 17.99 acted on the core, fine A 660-g hoop 95 cm in diameter is rotating at 170 rpm about its 32. Example 11.2: Astro 22. A 1.3-th-diameter golf ball has mass 45 g and is spinning at central axis. What's its angular momentum? L: 1W=0-66*(0-95) x 140x277.10 km and determin core that collapsed to 3000 rpm. Treating the golf ball as a uniform solid sphere, what's ing with a period of 4 its angular momentum? 18-3 33. Example 11.2. The s 10-598 rpm With her arms outstre Section 11.4 Conservation of Angular Momentum tational inertia is 3.5 23. A potter's wheel with rotational inertia 6.20 kg•m? is spinning (Fig. 11.6b), her rot freely at 20.0 rpm. The potter drops a 2.50-kg lump of clay onto her final spin rate? L = 6 2 x 2-1 = 12-99~13 - 2x2 22 13= 60.48)" x 2.5 W W = 2 . X z W = 20x2T 60 ²2.1 ~ 1 12.574

［高二物理 圓周運動］ 請問這一題的E選項該怎麼解釋？ 感謝你們

度運動 定是圓形 F=mv² T. For mor > (BK)2. 設地球為正球體,半徑為R,自轉週期為T,則下列敘述哪些正確? (A)在臺灣與在美國的時間不同,所以轉動的角速度也不同 (B)若有一質量m的物體置於赤道上,則 重量減輕 4元 mR (C在緯度為6的地 方,其向心加速度為4rfR 向為 33ton FC=0 TA COS (D在北極的向心力與重力之比值為0 (因 E. m 6 cos 元 Y. T2 為北極與 赤道距地心的距離一樣,所以視重皆相同

［高二物理 牛二］ 請問為什麼甲乙的加速度還要相加/減？ 感謝你們(´･ω･`)

範例 6 阿特午機+斜面 <10A 学 1.0 kg 14. Oke ngoose 1 20 ! 30° 甲、乙兩物體的質量各為1.0 kg 和4.0kg,以 細繩連接,跨過質量可不計的滑輪,置於兩個 斜角均為30°的光滑長斜面上,如右圖所示。 若兩物體自靜止釋放,經過1.0秒,乙物體沿 斜面移動多少公尺?(設重力加速度為10m/s) (A)0 (B) 1.5 (C) 2.0 (D) 2.5 (E) 3.0 mg. 315 答 5*a = 二 = Formgros 60° = 1x10 +0,5=5 F2 = mg cos 60° = 4x10x 0.5-40 F=ma ( Ez ZFP) & T-5=1xa 2:00-T=4a.

求解！

737 Two masses are joined by a massless string. A 30-N force applied vertically to the upper mass gives the system a constant upward acceleration of 3.2 m/s2. If the string tension is 18 N, what are the two masses? apety, litly

不好意思 請問這題是如何利用時間推出答案的呢？謝謝🙏

11. 類題)將位於同一高度的甲、乙兩質點,以相同初速同時鉛直上拋。甲在僅受重力的情況 下,自初始上拋至再回到起點所需的時間為tp,過程中最大的上升高度離起抛點為 h。但乙在上升時,與一片固定在離起點高度為的水平鋼板面發生彈性碰撞而 h 向下折返,自初始上拋至再回到起點所需的時間為tz。若空氣阻力可忽略,則下列 敘述何者正確? (A)=tz 102 (B)乙再回到起點瞬間,甲的速度方向為向上 -C在各自再回到起點瞬間,甲、乙兩者的動能相同 (D) 就上拋至再回到起點的整個過程而言,重力對甲所作之功大於對乙所作之功 (E) 乙發生碰撞後,向下運動的加速度量值,大於甲向下運動的加速度量值。 答 SI 1) 七