问题
问答题
在图中作出a点向心加速度方向，作出b点线速度方向．
答案
图中a、b两点均做匀速圆周运动，加速度指向圆心，速度为曲线的切线方向；
如图所示：
故答案为：如图所示．
搜题请搜索小程序“爱下问搜题”
在图中作出a点向心加速度方向，作出b点线速度方向．
图中a、b两点均做匀速圆周运动，加速度指向圆心，速度为曲线的切线方向；
如图所示：
故答案为：如图所示．
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| Why 1 children go to school? Do you know? You may 2 that they go to school to learn Chinese, English and some 3 subjects. This answer is 4 .But do you know 5 they learn all these things? Do they learn all these things 6 school? The answer is "on".Children must learn how to learn at school. No one can learn 7 at school.When they 8 school they must continue( 继续)to learn. So a good teacher at school 9 his students to learn something and teaches them the ways of learning it. Then children can continue to learn 10 after they leave school. | ||||
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