A small car of mass 880kg can go from rest to 20m/s in 10 seconds. This number is typically quoted for an empty car.(a) How far does it have to run to reach 20m/s?(b) If the car has 2 passenger (60kg each), how long (time duration)will it take for the car to go from 0 to 20 m/s? Assume that the force driving the car remains constant for both cases.

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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.