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Find the magnitude and the direction of the resultant force and coefficient of kinetic friction.

1. An object is pulled northward by the force of 10 N and at the same time another force of N pulls it southward. What is the magnitude and direction of the resultant force on object?

2. An object slides on the level surface in the +x direction. It shows and comes to a stop with a constant acceleration of -2.45m/s2. What is the coefficient of kinetic friction between the object and the floor?

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