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Atrainataconstant60.km/hmoveseastfor40.0min,theninadirectionof50.0degreeeastofnorthfor20.0minutes,andthenwestfor50.0minutes.Whatarethea)magnitudeandb)Angleofitsaveragevelocityduringthistrip?Atoneinstantabic
题目详情
A train at a constant 60.km/h moves east for 40.0min,then in a direction of 50.0 degree east of north for 20.0 minutes,and then west for 50.0 minutes.What are the
a) magnitude and
b) Angle of its average velocity during this trip?
At one instant a bicyclist is 40.0m due east of a park’s flagpole,going south with a speed of 10.0m/s.Then 30.0 seconds later,the cyclist is 40.0m due north of the flagpole,going due east with a speed of 10.0m/s.for the cyclist in this 30.0s interval,what are the
a) magnitude and
b) Direction of the displacement.
a) magnitude and
b) Angle of its average velocity during this trip?
At one instant a bicyclist is 40.0m due east of a park’s flagpole,going south with a speed of 10.0m/s.Then 30.0 seconds later,the cyclist is 40.0m due north of the flagpole,going due east with a speed of 10.0m/s.for the cyclist in this 30.0s interval,what are the
a) magnitude and
b) Direction of the displacement.
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答案和解析
我物理不好,帮你翻译下吧.
1、一列火车以60千米/时的速度向东行驶了40分钟,然后向北偏东50度方向行驶了20分钟,然后向西行驶了50分钟.
(1)速度的大小
(2)在旅途中平均速度速度的方向
2、在某一时刻,一名自行车运动员在某停车场的旗杆40米向东处,以10米/秒的速度向南行进.30秒钟后,此人在旗杆正北40米处以每秒10米的速度向东星际.在这30秒的的间隔内,求
(1)位移的大小
(2)位移的方向
1、一列火车以60千米/时的速度向东行驶了40分钟,然后向北偏东50度方向行驶了20分钟,然后向西行驶了50分钟.
(1)速度的大小
(2)在旅途中平均速度速度的方向
2、在某一时刻,一名自行车运动员在某停车场的旗杆40米向东处,以10米/秒的速度向南行进.30秒钟后,此人在旗杆正北40米处以每秒10米的速度向东星际.在这30秒的的间隔内,求
(1)位移的大小
(2)位移的方向
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