the square of the velocity of the object D. the product of the mass and the velocity of the object 相关知识点: 试题来源: 解析 C。动能“kinetic energy”与物体速度的平方成正比。动能公式为 E=1/2mv²。选项 A 仅质量不行;选项 B 速度不对;选项 D 不是质量和速度的乘积。反馈 收藏 ...
结果1 题目 (e) The energy of a moving object is directly proportional to the square of its speed.The speed of the object is increased by 30%.Calculate the percentage increase in the energy of the object.69 % [2] 相关知识点: 试题来源: 解析 69(e):M1 for figs oe 反馈 收藏 ...
The energy and momentum of a moving object ( ) important in physics. A. 干不物得增例度角干不物得增例度角is干不物得增例度角干不物得增例度角 B. 热们达里十精复花相张这多务农新水车热们达里十精复花相张这多务农新水车are热们达里十精复花相张这多务农新水车热们达里十精复花相张这多...
Yougaingreaterconfidenceinyourself.Also,youbecomemoreoptimisticandcalmerinthemindthanbefore.Thereareseveralreasonsforthesechanges:yourself-imageimprovesasyoustartlivingintidybeautifulrooms,andyougaindecision-makingskillsasyoucontinuetochoosebetweenwhichthingstothroworgiveawayandwhichtokeep.ThewayweletgoofthingsintheKo...
题目 (c) The kinetic energy, E, of an object of mass m kg moving with velocity v m/s can be found using the formul E=1/2mv^2 . Find the value of m when E =120 and v=8. 相关知识点: 试题来源: 解析 (c)PD=12
Steps to Calculate the Kinetic Energy of a Moving Object Step 1: Identify the mass and velocity of the object Step 2: Substitute these values into the formula for kinetic energy Step 3: Calculate the result in units of energy Equations & Definitions for Calculating the Kinetic Energy of...
producesahighamountofenergy.Whileit?strue thatlightcandamageoureyesundercertaincircumstances,there?snoscientificevidencesuggestingthatbluelightisharmfultooureyes.But manypeoplestillthinkitis,whichiswhybluelight-blockingglassesaresopopular.Sodothe glasseswork? “Everyoneisveryconcernedthatbluelight maybecausingdamage...
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The kinetic energy of an object with a mass of 3 kilograms moving at a speed of 4 meters per second is ___ joules. A. 12 B. 24 C. 36 D. 48 相关知识点: 试题来源: 解析 B。解析:动能公式为 Eₖ = 1/2mv²,m = 3kg,v = 4m/s,代入可得 Eₖ = 1/2×3×4² = 24J...
结果1 题目 18 The kinetic energy E of an object of mass m moving at speed v is given by the equation shown.Which equation is not used in the derivation of this equation? B A F= ma B s=vt C v^2=u^2+2as D W = Fs 相关知识点: 试题来源: 解析 B 反馈 收藏 ...