Answ er sessionmaster ing physicscommyctassig nmentpr

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Unformatted text preview: entPr intView?assig nmentID= 2252604 5/19 24 03 2013 HW- 5 left right ANSW ER: partic le A partic le B partic le C partic le D partic le E none Correct Par t C Rank the partic les on the bas is of their s peed. Ra nk from la rge st to sm a lle st. To ra nk ite m s a s e quiva le nt, ove rla p the m . Hin t 1. Determining velocity based on particle trajectories A c harged partic le moving in a uniform magnetic field follows a c irc ular trajec tory . By Newton's s ec ond law, the magnetic forc e ac ting on the partic le mus t be equal to the produc t of its mas s and ac c eleration: . In our s c enario, the veloc ity and field vec tors are perpendic ular, s o . Als o, s inc e the partic le moves along a c irc ular path, the ac c eleration mus t equal the ex pres s ion for c entripetal ac c eleration: . This c an be s olved for veloc ity to y ield . Thus , the s peed of a partic le c an be determined by meas uring the radius of its c irc ular path in a k nown magnetic field, as s uming that y ou als o k now the c harge and mas s of the partic le. ANSW ER: session.master ing physics.com/myct/assig nmentPr intView?assig nmentID= 2252604 6/19 24 03 2013 HW- 5 Correct Par t D Rank the partic les A, B, C, and E on the bas is of their s peed. Ra nk from la rge st to sm a lle st. To ra nk ite m s a s e quiva le nt, ove rla p the m . ANSW ER: session.master ing physics.com/myct/assig nmentPr intView?assig nmentID= 2252604 7/19 24 03 2013 HW- 5 Correct Par t E Now as s ume that partic les A, B, C, and E all have the s ame magnitude of elec tric c harge. Rank the partic les A, B, C, and E on the bas is of their s peed. Ra nk from la rge st to sm a lle st. To ra nk ite m s a s e quiva le nt, ove rla p the m . Hin t 1. Charged particle trajectories in magnetic fields Partic les A, B, C, and E are c harged. A c harged partic le moving in a uniform magnetic field follows a c irc ular trajec tory . The s peed of the partic le has two dis tinc t effec ts on the radius of its c irc ular path. Firs t, the fas ter the partic le moves , the larger the magnetic forc e ac t...
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