• 2021-04-14
    一花样滑冰运动员,开始自转时其动能为 http://edu-image.nosdn.127.net/_PhotoUploadUtils_ec958271-d8aa-4618-b3cd-fe39d12b51aa.png, 然后他将手臂收回,转动惯量减少为原来的 http://edu-image.nosdn.127.net/_PhotoUploadUtils_cdb564af-7712-4e3c-bb42-e2dce995113a.png ,即 http://edu-image.nosdn.127.net/_PhotoUploadUtils_abad0db3-885c-46e8-9f16-2559a6c04e77.png 则此时他的角速度和动能分别为