Question

Distinguish between static and sliding (kinetic) friction and define the coefficient of sliding friction. How would you investigate the laws of sliding friction between wood and iron?

Answer 1

Answer

Static friction is the friction present between two objects that have no relative motion.

Kinetic friction is the friction that occurs when the two objects in contact move relative to each other and rub together.

Kinetic friction is always less then satic friction.

Law of sliding friction can be given as

$f=\mu N$

N= normal force

$\mu$ is cofficient of friction which is property of the meterial.it have different value for different meterial.