PH 105 Midterm: ph105_S16_exam3
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A uniform solid cylinder of mass m , radius r, and length 2r rotates through an axis running through the central axis of the cylinder. The wheel is run at that angular velocity for 37 s and then power is shut o . The wheel decelerates uniformly at 1. 5 rad/s2 until the wheel stops. In this situation, the time interval of angular deceleration (slowing down) is closest to: 23 s, 15 s, 17 s, 19 s, 21 s, future space stations will create an arti cial gravity by rotating. Consider a cylindrical space station 195 m radius rotating about its central axis. Astronauts walk on the inside surface of the space station. What rotation period will provide normal gravity: 28 s, 4. 4 s, 6. 3 s, 40 s, a new roller coaster contains a loop-the-loop in which the car and rider are completely upside down.
