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The Gravitron is an amusement park ride in which riders stand against the inner wall of a large spinning steel cylinder. At some point, the floor of the Graviton drops out, instilling the fear in riders that they will fall a great height. However, the spinning motion of the Gravitron allows them to remain safely inside the ride. Most Gravitrons feature vertical walls, but the example shown in the figure has tapered walls of o. According to knowledgeable sources, the coefficient of static friction between typical human clothing and steel ranges between to . In the figure, the center of mass of a 55 kg rider resides 3.0 m from the axis of rotation. As a safety expert inspecting the safety of rides at a county fair, you want to reduce the chances of injury. What minimum rotational speed (expressed in rev/s) is needed to keep the occupants from sliding down the wall during the ride?
The average temperature in Gunnison for the first two months of the year are: 1) January (31 days) 10°F 2) February (28 days) 15° F. What are the total number of degree days for Gunnison over these two months?
A 75-kg man is riding in a 75-kg cart at 1.0 m/s. He jumps off in such a way as to land on the ground with no horizontal velocity
A college professor keeps 0.25 L (0.00025 m^3) of hot coffee in a thick styrofoam container. at what rate is heat flowing out through the walls of the container
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 301.0 Hz. The tuner hears 2.0 beats per second. What was the original frequency of the untuned string
Consider a rocket-powered hockey puck, and assume the rocket produces a constant acceleration when the rocket is on. Determine the impact location and the impact speed of the puck
On December 3, 2011, Jason sold th ebonds for $383,000 after amortizing $1,000 of the original issue discount. Illustrate what are the nature and amount of Jason's gain or loss?
A large box of mass 50kg lies on a frictionless inclined plane at an angle of 30º. What is the Normal Force acting on the box
A 1.09-µF capacitor is charged by a 31.0-V power supply. The fully charged capacitor is then discharged through a 9.8-mH inductor. Find the maximum current in the resulting oscillations.
A factory worker pushes a 30.0kg crate a distance of 4.4 m along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. What is the total work done on the crate
If the bee walks on the stick with a speed of 1.44 cm/s relative to the still water, what is the speed of the stick relative to the water
A wheel of radius 160 cm is has an angular velocity of 400 radians per minute. What is the linear velocity of the wheel in kilometers per hour
On a workday the average decibel level of a busy street is 85 dB, with 100 cars passing a given point every minute. what is the decibel level of the street
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