99. A 20.0-g object is placed against the free end of a spring (k equal to 25.0 N/m) that is compressed 10.0 cm (Figure 6-53). Once released, the object slides 1.25 m across the tabletop and eventually lands 1.60 m from the edge of the table on the floor, as shown. Is there friction between the object and the tabletop? If there is, what is the coefficient of kinetic friction? The sliding distance on the tabletop includes the 10.0-cm compression of the spring, and the tabletop is 1.00 m above the floor level. Example 6-13

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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.