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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 25.0o. According to knowledgeable sources, the coefficient of static friction between typical human clothing and steel ranges between 0.230 to 0.390. In the figure, the center of mass of a 54.6 kg rider resides 3.00 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? What is the maximum rotational speed at which the riders will not slide up the walls of the ride?
The drum of the photocopying machine in the problem above has a length of 48 cm and a diameter of 9 cm. What is the total charge on the drum
A jet makes a landing traveling due east with a speed of 115 m/s. If the jet comes to rest in 13.0s, what are the magnitude and direction of its average acceleration.
A car traveling 90km/h slows down at a constant 0.50 m/s^2 just by "letting up on the gas." Compute the distance it travels during the third second.
The counterbalance w1 weighs 100 N. Find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
Using the equation for the period of a pendulum, determine the period of a pendulum that is 3.0m long, Estimate the spring constant for each of the four springs on a 1260kg car if the static weight of the car causes the springs to compress 10.0cm
The two stick together and move off with a speed of 4.0 m/s. Evaluate what is the mass of the second car?
A ship sets out to sail to a point 156 km due north. An unexpected storm blows the ship to a point 118 km due east of its starting point. How far should it now sail to reach its original destination.
Find a circuit to change the relationship between waveform and zero-volt axis & calculating the period of waveform.
What is the magnetic field strength. Consider a ladder 5 meters tall, and a 150 kg weight on top of it. The ladder is leaning against the wall.
A copper rod (length=2 m, radius=3×10-3 m) hangs down from the ceiling. A 9.0-kg object is attached to the lower end of the rod. The rod acts as a "spring," and the object oscillates vertically with small amplitude. Ignoring the rod's mass, determ..
An engineer is designing a pacemaker for cardiac patients. For the 20 year old woman, how many times must device have to beat for her to have a normal life expectancy.
Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 15.0 cm) 10.0 cm away from an object. Find the image distance and the magnification. explain the image that he observes.
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