Solution:
y = A sin(kx -t) ; A = 2cm = 0.02m
So the wave equation will be y = (0.02)m sin(7.85x–1005t)
A wave in a string has an amplitude of 2 cm. The wave travels in the +ve direction of x axis with a speed of 128 ms-1 and it is noted that 5 complete waves fit in 4m length of the string. The equation describing the wave is
y = A sin(kx -t) ; A = 2cm = 0.02m
So the wave equation will be y = (0.02)m sin(7.85x–1005t)