Figure shows a string of linear mass density 1.0g/cm on which a wave pulse is travelling.
Find the time taken by the pulse in travelling through a distance of 50cm on the string. Take g=10m/s2
The correct option is C0.05s Applying equilbrium condition for 1kg block along vertical direction, T=mg=10N The tension in the string is 10N. The mass per unit length of string is, μ=1g/cm=0.1kg/m. Therefore the wave velocity is, v=√Tμ=√100.1=10m/s The time taken by the pulse in travelling through distance d=50cm=0.5m, ⇒t=dv=0.510=0.05s.