A playground ride consists of a disk of mass M = 36 kg and radius R = 1.6 m mounted on a low-friction axle (see gure below). A child of mass m z 25 kg runs at speed {A z 2.4 m/s on a line tangential to the disk and jumps onto the outer edge of the disk. Part 1 ' V Your answer is correct. (a) lfthe disk was initially at rest, now how fast is it rotating? (Enter your answer to at least three decimal places.) S rad/s Attempts: 3 of 10 used Part 2 ' V Your answer is correct. (b) What is the change in the kinetic energy of the child plus the disk? :J Where has most of this kinetic energy gone? thermal energy l Attempts: 7 of 10 used Part 3 V Your answer is correct. (d) Calculate the change in linear momentum of the system consisting ofthe child plus the disk (but not including the axle),from just before tojust after impact. (Assume the child is initially moving in the positive direction. Indicate the direction with the sign of your answer.) 7:51: kg-m/s What caused this change in the linear momentum? the force due to the axle Attempts: 5 of 10 used Part 4 V Your answer is correct. (e) The child on the disk walks inward on the disk and ends up standing at a new location a distance 0.80 m from the axle. Now what is the angular speed? (Enter your answer to at least two decimal places.) rad/s Attempts: 1 of 10 used Part 5 ' X Youranswer is incorrect. (f) What is the change in the kinetic energy of the child plus the disk, from the beginning to the end of the walk on the disk? J Save for Later a Attempts: 5 of 10 used