Question

One end of a 1,20 m long string is attached to a tuning fork with the frequency of 200Hz. On the other end of the string, hangs a weight with the mass of 2kg over a pulley and stretches the string. If the tuning fork is struck, a standing wave with 4 curves is formed. (Standing wave is when one end of the wave is fixed.)

legio er á tónkvíslina myndast standandi bylgja á strengnum med 4 bugõum myndin sýnir. 1.20 m M

a) What is the wavelength of this curve?
b) From the string, sound waves are emitted. What is their wavelength? (Speed of sound at 20°is 343 m/s)
c) At which speed do the waves travel on the string?
d) Show that the mass of the string is 1,633g?
e) The tuning fork is removed and the string attached directly to a wall. It's length is now 1,5m. What is the frequency of the standing wave with 1 curve? (Keynote)

Answer 1

(1) 21=2 & 1= 1.20 = 0.60m V=AF - 343018 = (x) (200 H2) Tasound = 1.715m © ② vaxt - (0.com) (200M2) = 12071% = I and T = mg 120² = (2x9.8) N 4 = 1.36 x 15 kg/m M = ML = (1.01x10) (1.20) = 1.633 x 10 kg = 1.613 grame u= 120 ml8 12 and f 120 ml = 150 H2