1902-10-01 10.2307/j100069 10 228 10.2307/j100069 228 1902 10.2307/2968889 amermathmont 141 228 141. Proposed by W. J. GREENSTREET, M. A., Editor of The Mathematical Gazette, Stroud. England. A sinmple pendulum hangs from a bicycle moving in a straight line. What deflection is produced by putting on the brake so as to exert on the machine a force equal to the nth of its weight? Solution by G. B. M. ZERR, A. M., Ph. D., Professor of Chemistry and Physics in The Temple College. Phila- delphia, Pa. Let v--veloeity of retardation, W=weight. Then v= W t g t. Let t1 .. vg/n. n'W n If O=angle of deflection of the pendulum, and I=its length, then v2 -g /n2 -2g1(1 - eosO). .oso9= 2- or o-eOs-1(21Y9) xml-18 p-18 eng 10 Oct., 1902 The American Mathematical Monthly 9 Greenstreet W. J. Zerr G. B. M. 1 10.2307/i349203 research-article 00029890