A 1000N crate is being pushed across a level floor at a constant speed by a force F of 300 N at an angle of 20 degrees below the horizontal, as shown in Figure P4.37a (1) What is the coefficient of kinetic Friction between the crate and the floor? (b) If the 300N force is instead pulling the block at an angle of 20 degrees about horizontal, as shown in Figure P4.37B, what will be the acceleration of the crate? Assume the coefficient of friction is the same as that found in (a). Show all math and include a free body diagram.