※ 引述《reideen107 (理想一直都在)》之铭言： : 6. Figure represents the total acceleration of a particle moving clockwise in : a circle of radius : 2.50 m at a certain instant of time. At this instant, find : (a) the radial acceleration, acos(π/6) : (b) the speed of the particle, and a = v^2 / r => v = √(ra) : (c) its tangential acceleration. asin(π/6) : 7. A simple pendulum has a mass of 0.250 kg and a length of 1.00 m. It is : displaced through an : angle of 15.0 and then released. What are : (a) the maximum speed, MgL(1-cos(π/12)) = (1/2)MV^2 可以解出V : (b) the maximum angular acceleration, and 在最低点的地方 V为(a)的结果 max a = (T-Mg)/M = V^2/L : (c) the maximum restoring force? 左右两端的地方 Mgcos(π/12) : 9.A 12.0-g wad of sticky clay is thrown horizontally at a 100-g wooden block : initially at rest on : a horizontal surface. The clay sticks to the block. After impact, the block : slides 7.50 m before : coming to rest. If the coefficient of friction between the block and the : surface is 0.650, what : was the speed of the clay immediately before impact? 滑行距离L 0^2 = (Vb)^2 - 2gμL 求出Vb mv = (m+M)Vb =>求出v : 请敎一下，感谢@@" : 附上题目网址 : http://0rz.tw/ab4hJ --

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