sciencequestionWhileoutorienteering,ZongMingruns1.50kmnorth,then2.00kmeast,atlasty3.00kmsouth.Ittookhimexactly72minutes(1.2hours)Q:Whatwashisdisplacement?

题目详情

science question
While out orienteering,Zong Ming runs 1.50km north,then 2.00km east,at lasty 3.00km south.It took him exactly 72 minutes(1.2 hours)
Q:What was his displacement?

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答案和解析

haha,it's so easy
his displacement is 2.5km ,the direction is arccos4/5 from east to south

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