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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?
You are holding a 35 kg dumbbell straight out at arm's length. Assuming your arm is 0.74 m long, what torque is the dumbbell exerting on your shoulder
Two identical point charges are fixed distance from one another. If one of their charges was doubled an the other was halved, how would the electric force be affected.
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
A person of mass 72-kg stands at the center of a rotating merry-go-round platform of radius 2.80 m and moment of inertia 930 kgcdot m^2. The platform rotates without friction with angular velocity 2rad/s. The person walks radially to the edge of t..
A singly charged positive ion has a mass of 2.37 10-26 kg. After being accelerated through a potential difference of 246 V, Calculate the radius of the path of the ion in the field
Accelerating charges radiate electromagnetic waves. Calculate the wavelength of radiation produced by a proton in a cyclotron with a radius of 0.500 m
Three charges are on the y-axis. Two of the charges, each ?2q, are locatedy=±d, and the third charge, +4q, Derive an expression for the electric field at a point P on the x-axis
A 66-N m torque acts on a wheel with a moment of inertia 175 kg m2. If the wheel starts from rest, explain how long will it take the wheel to make one revolution?
A diver springs upward from a board that is 2.95 meters above the water. At the instant she contacts the water her speed is 8.53 m/s, Determine her initial velocity
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 423 N and F2 = 355 N. What is the resultant of these two forces
An angler hangs a 4.52-kg fish from a vertical steel wire 1.65m long and 5.47×10?3cm2 in cross-sectional area. Calculate the amount the wire is stretched by the hanging fish
Tarzan has foolishly gotten himself into another scrape with the animals and must be rescued once again by Jane. What is Jane's (and the vine's) angular speed
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