一个物体作半径是0.1米的匀速圆周运动,每秒钟转5周,则它的角速度为______弧度/秒,线速度为______米/秒.
题型:不详难度:来源:
一个物体作半径是0.1米的匀速圆周运动,每秒钟转5周,则它的角速度为______弧度/秒,线速度为______米/秒. |
答案
物体作半径是0.1米的匀速圆周运动,角速度为:ω===10π rad/s; 线速度为:v===π m/s; 故答案为:10π,π. |
举一反三
匀速圆周运动的特点是( )A.速度变化,角速度不变化,加速度变化,周期不变化 | B.速度不变化,角速度变化,加速度不变化,周期变化 | C.速度变化,角速度不变化,加速度变化,周期变化 | D.速度不变化,角速度变化,加速度变化,周期不变化 | 有一物体沿旋转圆台匀速转动,圆半径为R,圆台与物体的最大静摩擦力是物重的 .要使物体不打滑,那么圆台角速度的安全速度为( )A.ω≤![](data:image/png;base64,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)
| B.ω≤![](data:image/png;base64,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) | C.ω≥![](data:image/png;base64,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) | D.ω=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAiCAIAAADQyG7qAAABGElEQVRIie2VvYHDMAiFtYXGUKEhPAUN29AwQmZQwyZu2IAtfAXRjx07US5FrjgqFf7ggcRz2D6I8A/3YMhhiAw8CzPkmNDqGUlmK9sqMURZrSXiom/BwQEtHEI+R69kC2Fr9oq8hLXwldSXsGGKL8uewoYp1WlpfpriCAthu6Saa5kfWNPs0e9sBn4jPobDr+Lrsv8qrIX3k+o3P1VZC4/e0B7sLNyWTAh3cBWWtZ4PjsUA/rX7RHOle2VbZQHWwhnYVom7TdJ81nCHhRCJANjPY2UtjCS+MAcndNgwpXRfPcMURxthWLzaw7ZuYdvb5aPmpQIHV+0Dazpd843IejtNqmGKY0dh2zuz/yi46DinMfXobd972z/Hrcj4gCA/RAAAAABJRU5ErkJggg==) | 如图所示的皮带传动中,两轮半径不等,下列说法正确的是( )A.两轮角速度相等 | B.两轮边缘线速度的大小相等 | C.同一轮上各点的向心加速度跟该点与中心的距离成正比 | D.大轮边缘一点的向心加速度大于小轮边缘一点的向心加速度 | 物体做匀速圆周运动的过程中,以下物理量发生变化的是( )A.线速度 | B.角速度 | C.周期 | D.频率 | 小王自驾车去旅游,他匀速通过一段弯道的过程中,关于车子的运动下列说法正确的是( )A.速度不变 | B.加速度为零 | C.“匀速”即速度大小不变 | D.运动方向可能会变 |
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