2-3A CoRRECT BY A ROTAT(NG OBSERVER WHEN ONE FRAME IS K0τTG Respec AoK,山MHUE r: OFFSET Fr 十 ORIGIN OF A+2(×) FRAMES 2 日5 UME ORIGINS f TWO fRamEs ARe ColIc KEY POLNT: NEWTON'S LAWs HOLD IN AN NE RTLAL FRAME;s0C升 R17 BT工 N THE Roτ ATNG FRAME,THsE×1ms R M 宁T085RVER工 N TE ROTA1八sY5TE,工T 俐v5ER5A5卫 F THE PARTICLE工 S BEING c∈0PoN6)AN斤 FECTIVE FoRce (示xyr) 义(x EFF