In a circus performance, a monkey is strapped to a sled andboth are given an initial speed of 4.0 m/s up a 20.0° inclinedtrack. The combined mass of monkey and sled is 20. kg, andthe coefficient of kinetic friction between sled and incline is0.20. How far up the incline do the monkey and sled move?

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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.