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A 1,360-N crate is being pushed across a level floor at a constant speed by a force F of 200 N at an angle of 20.0 below the horizontal, as shown in the figure a below. F F 20.00 20.00 a b (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 200-N force is instead pulling the block at an angle of 20.0 above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). m / s 2 Need Help? Read ItTutorial Exercise The force exerted by the wind on the sails of a sailboat is Fsail = 345 N north. The water exerts a force of erel = 225 N east. If the boat (including its crew) has a mass of 355 kg, what are the magnitude and direction of its acceleration? We choose east to be the positive x-direction and north to be the positive y-direction. The horizontal forces acting on the 355 kg boat (including crew) are shown in the diagram. nor! l1 * c'isl Fm: ' (D a One method of finding the desired acceleration is to compute the resultant force FR. For the magnitude of the force, where we have FR \\/ (2.392 + (25,)2 1/( x105N2)=-N