Same type of track as in the previous problem, this time with d = 2.73 m. The block starts at x = 0, and is given a push to the left with an initial speed of 4.46 m/s, so it starts sliding up the track to the left. At what value of x will the block reverse direction and start sliding back down? y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0 1.66 m 1.01 m -1.01 m -1.66 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.