Dear HenryI am glad to hear from you and thank you for your concern about my school lifeRecently, I have been preparing for the approaching college entrance examination, which isof great importance for me. Every day, I have to finish tons of assignments. It is a little bittough, but I am determined to leave no stone unturned to enter one of my dreamuniversitlesThank you again and best wishes to you!ours.

22.(6分)(2)0.42(2分)(2分)g+b(2分)gk(2)相邻的两个计数点之间还有四个点未画出,则相邻的计数点之间的时间间隔=0.ls,根据Ax=ax2,得a=++-x--xm,代入数据解得a=0.42ms2。(3)根据牛顿第二定律可知mg-(M-m)g=Ma,解得a=mg(1+u)M-g,结合题意可知,-g=-b,8(+Ak,解得B’4=8+bb

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