Question

A chain of mass $10kg$ and length $10m$ us resting on a rough horizontal surface $(\mu =0.2)$. A constant force of $20$ Newton is applied at one end. The tension in the mid point of the chain is

• A. $20N$
• B. $15N$
• C. $10N$
• D. $5N$

Answer 1

The correct option is D $5N$

mass$=10kg$

length$=10m$

$\mu =0.2$

Force$=20N$

Tension in the mid point of the chain

$f=\mu N=0.2\times 0.2N=\frac{2}{10}\times 20=4$

and $f^{\prime }=\frac{10}{10}N=1N$

Tension $=4+1=5N$