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1)A 44.4 kg box initially at rest is pushed 5.3m along a rough, horizontal floor with a constant applied horizonta force of 181.646N.

The acceleration of gravity is 9.8 m/s2.

If the coefficient of friction between box and floor is 0.38, find the work done by the friction. Answer in units of J.

The answer for this question is -876.33

2) find the final speed of the box. Answer UNits of m/s. Please help me in this problem....post the reply as soon as possible if u can.......