Citaat:
Origineel gepost door Chitesel
@ syoung.... hahaha geen school, geen mechanica niets!  |
Aha!
Maar daar kan ik een stokje voor steken!
"A child of mass 40 kg stands beside a circular platform of mass 80 kg and radius 2 m spinning at 2 rad/s. Treat the platform as a disk. The child steps onto the rim.
(a) Does the angular speed change? If so, what is the new value?
(b) She then walks to the center. Does the angular velocity change? If so, what is the new value?
(c) Does the kenetic energy change when she walks from the rim to the center? If so, by how much?"
Alvast bedankt
