One end of a 60m long rope of mass 1.8 kg is tied to a rigid horizontal support held high above the ground. The rope hangs vertically and kept taut by a weight eW suspended at its lower end. A person jerks the lower end of the rope sideways in a sinusoidal manner and a transverse wave of frequency 2 Hz and amplitude 10cm passes along the rope such that there are 2 cycles of the wave in the total length of the rope. Neglecting the weight of the rope as compared to the suspended weight W and with `g = 10m//s^2`, answer the following questions. (`S = 75 xx l0^(-4) m^(2))`),

Mass corresponding to the suspended weight W is

Options

A. 14.2kg
B. 10.8kg
C. 6.6kg
D. 8.4k

Answer

B