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A cylinder is rotating about an axis that passes through the center of each circular end piece. The cylinder has a radius of 0.0850 m, an angular speed of 88.0 rad/s, and a moment of inertia of 0.850 kg · m2. A brake shoe presses against the surface of the cylinder and applies a tangential frictional force to it. The frictional force reduces the angular speed of the cylinder by a factor of two during a time of 4.20 s.
(a) Find the magnitude of the angular deceleration of the cylinder.(b) Find the magnitude of the force of friction applied by the brake shoe.
Two identical resistors of R0 = 30 ? are connected head-to-tail. Write an expression for the new length in terms of the old length L.
Two circular loops of wire, each containing a single turn, have the same radius of 2.6 cm and a common center. find the magnitude of the net magnetic field at the common center
An anthropologist focuses her camera on a distant mountainpeak when she sees a very interesting looking monkey just 5.2 m away. Quickly sheadjusts the focus and takes the picture. If her lens has a focal length of 41mm,
A block of mass M= 100 kg is sliding down an inclined at an angle q= 30 degree above the horizontal. Find the acceleration of the block down the incline
A railroad car of mass 3.5*104 kg moving at 3.50 m/s collides and couples by two coupled railroad cars, each of the same mass as the single car and moving in the similar direction at 1.20 m/s. How much kinetic energy is lost in the collision?
a firefighter with a weight of 673 n slides down a vertical pole with an acceleration of 3.05 ms2 directed downward.
100g of ice at -10C is placed into 100g of warm water in an insulated container. Calculate the mass of the ice that remains when equilibrium is achieved
Suppose unpolarized light of intensity 244 W/m2 falls on the polarizer in the figure, and the angle in the drawing is 36.0°. What is the light intensity reaching the photocell
In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 10.0oC. The temperature at the inside surface of the wall is 22.0oC. The wall is 0.17 m thick and has an area of 7.1 m2.
Condensation occurs on a bathroom window at a rate of 0.5 kg per hour. If the bathroom air is at 26°C and fully saturated with water vapour, compute approximately, the rate of heat transfer onto the window surface if the inside surface is maintain..
At a construction site, a 23.0 bucket of concrete is connected over a very light frictionless pulley to a 310 box on the roof of a building. (See the figure.) There is no appreciable friction on the box, since it is on roller bearings. The box starts..
a ramp consisting of a large piece of cardboard poster board or similar thin and smooth materiala toy car such as a
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