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Item 17 17 of 27 Review | Constants A merry-go-round of radius R, shown in the figure, is rotating at constant angular speed. The friction in its bearings is so small that it can be ignored. A sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. The sandbag does not slip or roll upon contact with the merry-go-round. R Part A Rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round. Rank from largest to smallest. To rank items as equivalent, overlap them. ► View Available Hint(s) Reset Help m = 10 kg m = 10 kg m = 20 kg m = 10 kg m = 40 kg m = 15 kg r = 0.50R T = 0.25R T = 0.25R r = 1.0R r = 0.25R r = 0.75R largest smallest (00 (of

Item 19 In your job as a mechanical engineer you are designing a flywheel and clutch-plate system like the one in (Figure 1). Disk A is made of a lighter material than disk B, and the moment of inertia of disk A about the shaft is one-third that of disk B. The moment of inertia of the shaft is negligible. With the clutch disconnected, A is brought up to an angular speed wo; B is initially at rest. The accelerating torque is then removed from A, and A is coupled to B. (Ignore bearing friction.) The design specifications allow for a maximum of 2400 J of thermal energy to be developed when the connection is made. Figure BEFORE AFTER F Forces Fand-Fare along the axis of rotation. and thus exert no torque about this axis on either disk. 1₁ + 18 1 of 1 Part A What can be the maximum value of the original kinetic energy of disk A so as not to exceed the maximum allowed value of the thermal energy? Express your answer with the appropriate units. Ti μà 5 ? KA= Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Provide Feedback