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A potter's wheel having a radius 0.45 m and a moment of inertia of 11.4 kg · m2 is rotating freely at 48 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 74 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag
Some believe that the positions of the planets at the time of birth influence the newborn. Calculate the gravitational force exerted on the baby by the planet Jupiter (m=1.9*10^27 kg) at its closest approach to the earth
Sea Launch mission planners are going to launch their Russian launch vehicle from a Lo = 3 degrees into LEO with an inclination of 34 degrees and the longitude of ascending node of 124 degrees. Current LST at the launch site is 1140.
A microwave oven of mass 12.5kg is pushed a distance 8.00m up the sloping surface of a loading ramp inclined at an angle of 36.2? above the horizontal, What is the work done on the oven by the force
A wire is formed into a circle having a diameter of 11.2 cm and is placed in a uniform magnetic field of 3.22 mT. Find the maximum torque on the wire
What is the Total Energy of an object that has mass of 6.54 kg, with a velocity of 6.27 m/s, which is also experiencing an acceleration of 9.99 m/s2 at a height of 1.53 m
A block of mass m = 2.0 kg is dropped from height h = 90 cm onto a spring of spring constant k = 1960 N/m. Find the maximum distance the spring is compressed
Chiana is stalking a fly of mass 0.10 g, but the fly gets caught in a spider's web. What is the value of the effective spring stiffness constant k for the web
A convex spherical mirror, whose focal length has a magnitude of18.8cm, is to form an image11.2cm behind the mirror. Where should the object be placed? What is the magnification of the mirror?
A spring with a spring constant k of 18 N/m is stretched a distance of 12 cm (0.12 m) from its original unstretched position
At a pressure of 1 atm, the heat of vaporization of water is 22,260,000 J/kg; use the first law of thermodynamiics to calculate the heat of vaporization of water at 25 celcius
A 53.6-kg skateboarder starts out with a speed of 2.49 m/s. He does 114 J of work on himself by pushing with his feet against the ground. How much has the vertical height of the skater changed
A textbook of mass 1.98kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.160m , find the tension in the part of the cord attached to the book
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