Grade 9 Test on Mechanics 20241217 (id: d5c4f67a1)

[单选题]
An object is thrown upward)jyg 4ud :su9n with a speed of 15 nbht3j+eyh i :u*. *f-dbuq/i m/s on the surface of planet X where the accelera *h *j3iy./ihutb-enb qfu+ :dtion due to gravity is $2.5m/s^2$. How long does it take for the object to return to where it is thrown?

A. $6.0s$
B. $8.0s$
C. $10s$
D. $12s$


参考答案:  D


本题详细解析: 暂无

微信扫一扫，分享更方便