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**1. My problem is I know displacement is 20m, acceleration is -5.4m/s, final velocity is 0m/s, coefficient of friction=0.55, the object slowing down weighs 1000kg, can I find initial velocity and the time it took to slow down and if so how? I have no idea how to go about this problem**

**2. Equations of motion and coeffcient of friction = frictional force/normal force?? maybe F=ma**

**3. As I said I really dunno how to start this one or if its even possible at my level.**