## College Physics (4th Edition)

The linear mass density of the cord is $3.8~grams/meter$
We can find the linear mass density of the cord: $v = \sqrt{\frac{F}{m/L}}$ $v^2 = \frac{F}{m/L}$ $\frac{m}{L} = \frac{F}{v^2}$ $\frac{m}{L} = \frac{75~N}{(140~m/s)^2}$ $\frac{m}{L} = 0.0038~kg/m$ $\frac{m}{L} = 3.8~g/m$ The linear mass density of the cord is $3.8~grams/meter$