A uniform disk with mass 41.8kg and radius 0.280m is pivoted at its center about a horizontal,frictionless axle that is stationary.The disk is initially at rest,and then a constant force 28.0N is applied tangent to the rim of the disk.1.What is the m

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A uniform disk with mass 41.8kg and radius 0.280m is pivoted at its center about a horizontal,frictionless axle that is stationary.The disk is initially at rest,and then a constant force 28.0N is applied tangent to the rim of the disk.1.What is the m
A uniform disk with mass 41.8kg and radius 0.280m is pivoted at its center about a horizontal,frictionless axle that is stationary.The disk is initially at rest,and then a constant force 28.0N is applied tangent to the rim of the disk.
1.What is the magnitude v of the tangential velocity of a point on the rim of the disk after the disk has turned through 0.200 revolution?
2.What is the magnitude α of the resultant acceleration of a point on the rim of the disk after the disk has turned through 0.200 revolution?
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一个均衡圆盘，41.8千克，半径0.280米，中心有水平、无摩擦轴力的转动轴。圆盘最初是处于静止状态，然后盘缘施加一个恒定的相切的力，大小28.0N。
1）在0.200圈后，相切方向上的速度大小为多少？
2）在0.200圈后，总加速度的大小为多少？

A uniform disk with mass 41.8kg and radius 0.280m is pivoted at its center about a horizontal,frictionless axle that is stationary.The disk is initially at rest,and then a constant force 28.0N is applied tangent to the rim of the disk.1.What is the m
看不懂,翻一下,要准确.

额 这个题呀，我试着翻译一下。 一个重41.8kg半径0.280米的圆盘水平放置在平面上，绕中轴旋转，无摩擦，盘子最初是静止的，然后再盘子边缘施加一个28N的切向力。
问：1，当盘子转过0.2转后，边缘上的点切向加速后的速度多大。2.当盘子转过0.2转后，其边缘上点的合成加速度多大。。 有点乱 “of”把我乱的。。。。
额 上面仁兄已经做出来了 不过高中木有学过转...

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额 这个题呀，我试着翻译一下。 一个重41.8kg半径0.280米的圆盘水平放置在平面上，绕中轴旋转，无摩擦，盘子最初是静止的，然后再盘子边缘施加一个28N的切向力。
问：1，当盘子转过0.2转后，边缘上的点切向加速后的速度多大。2.当盘子转过0.2转后，其边缘上点的合成加速度多大。。 有点乱 “of”把我乱的。。。。
额 上面仁兄已经做出来了 不过高中木有学过转动惯量吧。。

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需要用的公式有：M = J α，M = F r，J = m r^2/2, v = ω r, ω^2 -ω0^2 = 2α(θ - θ0),
at = rα, an = r ω^2, a^2 = at^2+an^2,
现说明之：M是力矩，J是转动惯量， α是角加速度，F是切向力为已知，r是半径，ω是角速度，ω0是初始角速度，为0，θ - θ0是角位移等于0.200计算时要化...

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需要用的公式有：M = J α，M = F r，J = m r^2/2, v = ω r, ω^2 -ω0^2 = 2α(θ - θ0),
at = rα, an = r ω^2, a^2 = at^2+an^2,
现说明之：M是力矩，J是转动惯量， α是角加速度，F是切向力为已知，r是半径，ω是角速度，ω0是初始角速度，为0，θ - θ0是角位移等于0.200计算时要化成弧度，θ0为0，at是切向加速度，an是法向加速度，a是总加速度。
先求出 α，角加速度，再算出ω，角速度，则v可算出，最后去计算加速度。

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A uniform disk with mass 41.8kg and radius 0.280m is pivoted at its center about a horizontal,frictionless axle that is stationary.The disk is initially at rest,and then a constant force 28.0N is applied tangent to the rim of the disk.1.What is the m With an excellent uniform 关于力矩torque的物理题A string is wrapped around a uniform disk of mass M = 1.5 kg and radius R = 0.11 m.(Recall that the moment of inertia of a uniform disk is (1/2)MR2.) Attached to the disk are four low-mass rods of radius b = 0.19 m,each 一道英文物理题!A potter's wheel (a solid,uniform disk) of mass 6.0kg and radius R spins about its central axis with 5.0 rad/s.A 2.0kg lump of clay is dropped onto the wheel and sticks at the edge,decreasing its angular speed.Find the new angul uniform为什么是a uniform而不是an uniform? uniform为什么是a uniform而不是an uniform? a uniform还是an uniform急 wear a uniform 还是wear uniform 请问 a uniform gravitational field 中的 uniform 首字母填空A computer is a useful m with a good memory.I is stored on a flopp disk a hard disk.All a还是an uniform meke a uniform是什么意思 Disk The man ______police uniform is my uncle.A.on B.in C.wear D.with 英语翻译The Flash drive with Compact Flash card reacts identically as a standard IDE hard disk preset as a master. uniform前+a还是an a uniform是什么意思一个什么 a uniform是啥意思?