阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答卷标号为1-10的相应位置上。

Once there lived a rich man __1_ wanted to do something for the people of his town. _2__ first he wanted to find out whether they deserved his help.

In the centre of the main road into the town, he placed __3__ very large stone. Then he __4__(hide) behind a tree and waited. Soon an old man came along with his cow.

“Who put this stone in the centre of the road？” said the old man，but he did not try to remove the stone. Instead, with some difficulty he passed around the stone and continued on his way. __5__ man came along and did the same thing; then another came, and another. All of them complained about the stone but not tried to remove 6_. Late in the afternoon a young man came along. He saw the stone，_7__(say) to himself: “The night _8_(be) very dark. Some neighbors will come along later in the dark and will fall against the stone.”

Then he began to move the stone. He pushed and pulled with all his 9__(strong) to move it，only __10__(find) a bag of money under the stone. Imagine how surprised he was!

如图所示，质量M=20kg的物体从光滑斜面上高度H=0.8m处释放，到达底端时水平进入水平传送带（不计斜面底端速度大小的损失，即在斜面底端速度方向迅速变为水平，大小不变），传送带由一电动机驱动着匀速向左转动，速率为3m/s．已知物体与传送带间的动摩擦因数μ=0.1．物体冲上传送带后就移走光滑斜面．（g取10m/s²）．

（1）物体滑上传送带A点时的速度大小．

（2）若两皮带轮AB之间的距离是6m，物体将从哪一边离开传送带？

（3）若皮带轮间的距离足够大，从M滑上到离开传送带的整个过程中，求M和传送带间相对位移．