作业帮两个英语关于动量和力矩的物理题 老做不对
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/12 09:31:15
两个英语关于动量和力矩的物理题 老做不对
What is the angular momentum of a figure skater spinning (with arms in close to her body) at 3.5 rev/s,assuming her to be a uniform cylinder with a height of 1.5 m,a radius of 16 cm,and a mass of 55 kg.
1 [_______]kg·m2/s
(b) How much torque is required to slow her to a stop in 5.0 s,assuming she does not move her arms?
2 [_______]m·N
A centrifuge rotor rotating at 15000 rpm is shut off and is eventually brought to rest by a frictional torque of 1.00 m·N.If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m,through how many revolutions will the rotor turn before coming to rest?
1 [_______]rev
How long will it take?
2 [_______]s
What is the angular momentum of a figure skater spinning (with arms in close to her body) at 3.5 rev/s,assuming her to be a uniform cylinder with a height of 1.5 m,a radius of 16 cm,and a mass of 55 kg.
1 [_______]kg·m2/s
(b) How much torque is required to slow her to a stop in 5.0 s,assuming she does not move her arms?
2 [_______]m·N
A centrifuge rotor rotating at 15000 rpm is shut off and is eventually brought to rest by a frictional torque of 1.00 m·N.If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m,through how many revolutions will the rotor turn before coming to rest?
1 [_______]rev
How long will it take?
2 [_______]s
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