•6 A bead with mass 1.8 × 10-2 kg is moving along a wire in the positive direction of an x axis. Beginning at time t = 0, when the bead passes through x = 0 with speed 12 m/s, a constant force acts on the bead. Figure 7-24 indicates the bead's position at these four times: t, = 0, t1 = 1.0 s, tz = 2.0 s, and tz = 3.0 s. The bead momentarily stops at t = 3.0 s. What is the kinetic energy of the bead at t = 10 s? 10 15 20 x (m) Figure 7-24 Problem 6.

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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.