问题
填空题
如图是探究某根弹簧伸长量X与所受拉力F之间的关系图．由图可知，弹簧的劲度系数是______N/m．当弹簧受F=10N的压力作用时，弹簧压缩量为______ cm．
答案
图象斜率的大小表示劲度系数大小，故有k=2000N/m．
根据F=kx，将F=10N代入数据解得，x=0.5cm．
故答案为：2000；0.5．
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如图是探究某根弹簧伸长量X与所受拉力F之间的关系图．由图可知，弹簧的劲度系数是______N/m．当弹簧受F=10N的压力作用时，弹簧压缩量为______ cm．
图象斜率的大小表示劲度系数大小，故有k=2000N/m．
根据F=kx，将F=10N代入数据解得，x=0.5cm．
故答案为：2000；0.5．
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| Mrs Green lives in the country (乡村), and she doesn't know London very well. One day, she goes to London. She can't find her 1 . Just then she 2 a man near a bus stop. "I can ask him the way," she says to 3 and asks," Excuse me, will you please 4 me the way to King Street?" The man smiles with 5 answer. He 6 know English. He speaks Russian. He is a visitor. Then he 7 his hand into his pocket (口袋), 8 a piece of paper and lets her 9 it. On the paper are these words, "Sorry, I 10 English. | |||
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