某同学从斜面上某位置每隔0.1s释放一个小球.在连续释放几个小球后,测得XAB=0.75cm.XBC=1cm求:

1个回答

  • a=Δs/T^2=(0.01-0.0075)/0.1^2=0.25m/s^2

    Vb=(XAB+XBC)/2T=(0.01+0.0075)/2*0.1=0.0875m/s

    Xcd=XBC+(XBC-XAB)=0.0125m

    Vb/a=0.0875/0.25=0.35 0.35-0.1=0.25 =2*0.1+

    4A球上面滚动的小球还有2个