Analyzing Kinetic Energy and Momentum in a Disk System
School
Women Institute of Medical Technology, Abbottabad**We aren't endorsed by this school
Course
MATH 101
Subject
Physics
Date
Dec 11, 2024
Pages
1
Uploaded by alexlacaze123
A playground ride consists of a disk of mass M = 36kgandradius R = 1.5 m mounted on a low-friction axle (see figure below). A childofmassm = 21kgrunsatspeed v = 2.9 m/son aline tangential to the disk and jumps onto the outer edge of the disk. Part 1 (a) If the disk was initially at rest, now how fast is it rotating? (Enter your answer to at least three decimal places.) n rad/s Save for Late Attempts: 0 of 10 used BT T ol =g Part 2 (b) What is the change in the kinetic energy of the child plus the disk? [] : Where has most of this kinetic energy gone? VvV Save for Late Attempts: 0 of 10 used Part 3 (d) Calculate the change in linear momentum of the system consisting of the child plus the disk (but not including the axle), from just before to just after impact. (Assume the child is initially moving in the positive direction. Indicate the direction with the sign of your answer.) n kg-m/s What caused this change in the linear momentum? Vv ve for Late Attempts: 0 of 10 used Part 4 (e) The child on the disk walks inward on the disk and ends up standing at 2 new location a distance 0.75 m from the axle. Now what is the angular speed? (Enter your answer to at least two decimal places.) n rad/s Save for Late Attempts: 0 of 10 used Part 5 (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? Save for Late Attempts: 0 of 10 used
