A spring-loaded toy gun is aimed vertically and fired after a spherical projectile of mass  m = 28.5 g  is loaded by compressing the spring with force constant  k = 830 N/m  a distance of 9.10 cm. As the projectile travels a total distance of 58.4 cm along the barrel of the gun, it experiences a friction force of 2.25 N. What is the height reached by the projectile above its initial location with the spring compressed?  m

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.