→ exceedMyself:(1/2)MV^2=Fd--------(1) 04/22 00:29
→ exceedMyself:MV+0=(M+3M)*Vtotal--------(2) 04/22 00:30
→ exceedMyself:(1/2)MV^2+Fx=(1/2)(M+3M)(Vtotal)^2------(3) 04/22 00:33
→ exceedMyself:由(1)(2)(3)得x=0.75d 04/22 00:34
→ exceedMyself:(1)子彈動能變成木塊內對子彈的阻力作功 04/22 00:38
→ exceedMyself:(2)動量守衡 子彈動量+木塊動量(0)=子+木的總動量 04/22 00:40
→ exceedMyself:(3)子彈動能+木塊對子彈阻力作功=子+木的總動能 04/22 00:41