Physics Bowl by Topic 4: Kinematics - part III Projectile Motion (id: 8be16a9bc)

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]
17.32: A projectile is .ehch4zq/( g klaunched at an angle of 40° above the horj : hgbw i915/vvz2fxdizontal with a speed of 30 m/s . How much time passes before the position of the projectile makes an angle of 20° above the horizontal from the original launch 5z bvjh1wg 9x:i2vdf/point?

A. 3.02 s
B. 2.38 s
C. 2.18 s
D. 1.93 s
E. 1.64 s


参考答案:  C


本题详细解析: 暂无

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