An impulsive question You observe a baseball hit a bat straight-0n lie, 0 degrees from horizontal) with a speed of 45 m/s. It leaves the bat with a speed of 56 mfs, 15" above horizontal. A regulation baseball has a mass of 144 9. Assume a coordinate system with x as the horizontal and y as the vertical. a) What impulse did the bat deliver to the bail? Take the direction away from the batter as +x and include base 51 units (MKS) with your answer. b) What is the magnitude of the Change in the ball's momentum? Include units with your answer. W'M A spool is hanging by a string. We can model the spool as three connected disks: in the center, the string is wound around a narrow central disk, and two larger disks are on either side. The masses of the larger disks are 44 g each and their radii are 3.2 cm. The disk in the middle has a mass of 22 g and a radius of 1.6 cm. Let's assume the spool starts from rest and then is allowed to fall. a) What is the weight of the spool? Include units with your answer. 1.08 N a? b) What is the rotational inertia of the spool? Include appropriate 51 units with your answer. 4804 x10 X Unknown unit. Please check your unit for spelling, type or dimension. (2) Find the tension in the string; express your answer with units. Hints: you can describe the rotational forces symbolically, starting with the torque on the spool due to the string. Then you can think about the translational forces in the vertical direction. As in prior problems, nd the net force in the vertical direction, being careful with signs. Finally, relate angular and tangential acceleration. You'll end up with three unknowns and three equations; eliminate two unknowns and solve for the tension. '0343 N *7, d) If the spool falls 0.52 m, how long did it take to fall this far? Include units with your answer. 0.52 M X Dimensionally k. incorrect. Please check the type or dimension of your unit. e) If the spool were in free-fall, how many times faster would the spool tall 0.52 m? 1.35 X Show My Work (Optional) a