A transverse wave described by an equation

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

y = 0.02 \sin (x + 30t)

, where

x

and

t

are in metre and second, is travelling along a wire of area of cross-section

1 \text{ mm}^2

and density

8000 \text{ kgm}^{-3}

. What is the tension in the string? (1) 20 N (2) 7.2 N (3) 30 N (4) 14.4 N