本题目来源于试卷: Physics Bowl by Topic 3: Kinematics - part II Uniformly Accelerated Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.29: An object is thrown upwei l8;+j vhzk7e)e ;ftq 3x2w1kahmt 9ard j +l2p81 qu jg)ko4wquqcd7j-t8tu+ls with a velocity of 30 m/s near the surface of the earth. After two seconds what would be t)ud8u4wtlqjlupk1g t+jo 8q +jc-27q he direction of the displacement, velocity and acceleration?
displacement velocity acceleration
A. displacement ~ up; velocity ~ up; acceleration ~ up
B. displacement ~ up; velocity ~ up; acceleration ~ down
C. displacement ~ up; velocity ~ down; acceleration ~ down
D. displacement ~ up; velocity ~ down; acceleration ~ up
E. displacement ~ down; velocity ~ down; acceleration ~ down
参考答案: B
本题详细解析:
暂无
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