本题目来源于试卷: Physics Bowl by Topic 4: Kinematics - part III Projectile Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
13.43: A small 1.0kg mass is launched fromoft8a. 78g-nfwkw* vt the top ofe9n /nq iczhx43h* rllh*yn80 a cliff with speed $V$ at an angle of $30.0^{\circ}$ above the horizontal. When it reaches the ground, its velocity is directed at $45.0^{\circ}$ below the horizontal. Which one of the following choices is the magnitude of the total impulse that was imparted to the mass during its flight? Ignore air resistance.
A. $\frac{\sqrt{3}+1}{2}v$
B. $\sqrt{\frac{3}{2}} \frac{\sqrt{2}+1}{2}v$
C. $\frac{\sqrt{3}-1}{2}v$
D. $\frac{\sqrt{\frac{3}{2}}+1}{2}v$
E. $\sqrt{\frac{3}{2}} \frac{\sqrt{2}+1}{\sqrt{2}-1}v$
参考答案: A
本题详细解析:
暂无
| 
