021水平面内的圆周运动(圆锥摆模型)及其临界问题 精讲精练-2022届高三物理一轮复习疑难突破微专题
021水平面内的圆周运动(圆锥摆模型)及其临界问题一.必备知识1.圆周运动相关物理量定义、意义公式、单位线速度描述做圆周运动的物体沿圆弧运动快慢的物理量(v)(1)v==(2)单位:m/s角速度描述物体绕圆心转动快慢的物理量(ω)(1)ω==(2)单位:rad/s周期物体沿圆周运动一圈的时间(T)(1)T==,单位:s(2)f=,单位:Hz(3)n=,单位:r/s向心加速度(1)描述速度方向变化快慢的物理量(an)(2)方向指向圆心(1)an==rω2(2)单位:m/s22.圆周运动各物理量间的关系3.匀速圆周运动与变速圆周运动的区别与联系匀速圆周运动变速圆周运动运动特点线速度的大小不变,角速...
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