SAT2物理题(有关角动量)A rock with a mass of 0.05 kilograms is swung overhead in a horizontal circle of radius 0.3 meter at a constant rate of 5 revolutions per second.The angular momentum of the rock is A.0.14(千克*米的二次方/秒

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SAT2物理题(有关角动量)A rock with a mass of 0.05 kilograms is swung overhead in a horizontal circle of radius 0.3 meter at a constant rate of 5 revolutions per second.The angular momentum of the rock is A.0.14(千克*米的二次方/秒
SAT2物理题(有关角动量)
A rock with a mass of 0.05 kilograms is swung overhead in a horizontal circle of radius 0.3 meter at a constant rate of 5 revolutions per second.The angular momentum of the rock is
A.0.14(千克*米的二次方/秒,下同)
B.0.0056
C.0.32
D.1.32
E.2.45
有没有人能回答!N天过去了!

SAT2物理题(有关角动量)A rock with a mass of 0.05 kilograms is swung overhead in a horizontal circle of radius 0.3 meter at a constant rate of 5 revolutions per second.The angular momentum of the rock is A.0.14(千克*米的二次方/秒
1秒钟5圈,角速度10派每秒,半径0.3m线速度就是3X3.14m/s质量0.05kg
所以角动量=mvr=0.05X3X3.14X0.3约等于0.14……所以选A……
角动量……SAT咋还有物理竞赛的东西呢……

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