Physics (AS & A Level) · Oct / Nov 2017 · Paper 52 · Question 2
9702
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A student is investigating stationary waves on a stretched elastic cord. A vibrator attached to the cord is connected to a signal generator. The apparatus is set up as shown in Fig. 2.1. pulley elastic cord vibrator M Fig. 2.1 The mass M attached to the cord is adjusted until resonance is obtained. The number n of antinodes on the stationary wave is recorded. The experiment is repeated with different masses to obtain different values of n. It is suggested that M and n are related by the equation f L n Mg 2 n = where f is the frequency of the vibrator, g is the acceleration of free fall, L is the length of the elastic cord and n is the mass per unit length of the elastic cord. 1
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(d)(i)[3]
2(d)(ii)[1]
2(e)[2]
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