Chapter 15471(f)T=−+=+=204 025 0398002412033 060 4973 56.......afbgejbgkgm smsNmkg12 N ms ss2πThenfT==10281. Hz.(g)Tmgkvmksk=−+2µµincreases as mincreases, so the frequency decreases .(h)As kincreases, Tdecreases and fincreases .(i)As vincreases, Tdecreases and fincreases .(j)As −increases, Tincreases and fdecreases .*P15.75(a)Newton’s law of universal gravitation isFGMmrGmrr=−FHGIKJ22343πρThus,FGmrFHGIKJ43Which is of Hooke’s law form withkGm=43(b)The sack of mail moves without friction according to−FHGIKJ=43GmrmaaGrrFHGIKJ432ωSince acceleration is a negative constant times excursion from equilibrium, it executes SHMwith=43Gand periodTG23ρThe time for a one-way trip through the earth is
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