A student is at rest on a stool that may freely spin about its central axis of rotation. As the stool spins, the student holds onto two dumbbells as the stool spins at an angular speed of 1.2 rad/s with the student’s arms completely stretched out from the student’s body. At this instant, the student-dumbbell system has rotational inertia of 6 kg⋅m^2. The student then brings their arms close to their body, and rotational inertia of the student-dumbbell system is changed to 2 kg⋅m^2.
What is the new angular speed of the student?
A) 0.4 rad/s B) 1.2 rad/s C) 3.6 rad/s D) 7.2 rad/s
Answers: 3
Physics, 22.06.2019 19:30, jstephanie644
A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?
Answers: 1
Physics, 22.06.2019 22:20, queenbee2994
One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.
Answers: 2
A student is at rest on a stool that may freely spin about its central axis of rotation. As the stoo...
Computers and Technology, 01.12.2021 01:30
Chemistry, 01.12.2021 01:30
Social Studies, 01.12.2021 01:30
Social Studies, 01.12.2021 01:30
Medicine, 01.12.2021 01:30
English, 01.12.2021 01:30