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M[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ộ[/FONT][/FONT]t con l[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ắ[/FONT][/FONT]c lò xo dao [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]độ[/FONT][/FONT]ng [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đ[/FONT][/FONT]i[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ề[/FONT][/FONT]u hòa v[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ớ[/FONT][/FONT]i chu kì T và biên [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]độ [/FONT][/FONT]5 cm. Bi[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ế[/FONT][/FONT]t trong m[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ộ[/FONT][/FONT]t chu kì, kho[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ả[/FONT][/FONT]ng th[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ờ[/FONT][/FONT]i gian [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]để [/FONT][/FONT]v[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ậ[/FONT][/FONT]t nh[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ỏ [/FONT][/FONT]c[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ủ[/FONT][/FONT]a con l[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ắ[/FONT][/FONT]c có [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]độ [/FONT][/FONT]l[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ớ[/FONT][/FONT]n gia t[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ố[/FONT][/FONT]c không v[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ượ[/FONT][/FONT]t quá 100 cm/s2 là T.3 L[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ấ[/FONT][/FONT]y [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]π[/FONT][/FONT]2 = 10. T[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ầ[/FONT][/FONT]n s[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ố [/FONT][/FONT]dao [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]độ[/FONT][/FONT]ng c[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ủ[/FONT][/FONT]a v[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ậ[/FONT][/FONT]t là ?