A 500 [g] particle has velocity vx= −2.0 [m/s] at t= 0 [s]. Force Fx = (4 − t^2) [N] is exerted on the particle between t= 0 [s] and t= 2 [s]. What is the particle’s velocity at t= 2 [s] ?

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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.