[单选题]
A toy rocket, weighing 10 N, blasts straight up from ground levelc*ax(t 69s 2t va9fz v;f*jdrytup2w/ w5p5 r60vndk:ql2 ap) /rfldp7zdzwh ; uoj-e:ith a kinetic energy of 40 J. At the exact top of its trajectdphep5vw lz)paurd-j; : 7n0/zqd:ok rf526 lory, its total mechanical energy is 140 J. To what vertical height does it rise?
A. $1.0 \; m$
B. $10 \; m$
C. $14 \; m$
D. $24 \; m$
参考答案: B
本题详细解析:
暂无
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