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I started this problem by finding the acceleration of the block which is sin(36.87) *9.81=5.88599m/s^2

This times the mass is the force pulling up. = 15303 N

Next i found the frictional force which is N * u

so cos(36.87) * 9.81 * 2600 * .25 = 5101 N

I subtracted the force pulling up by the frictional force and multiplied it by the velocity 15303-5101 = 10201 * 1.07 = 10916 W

where did i go wrong because this is not the answer. thanks