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The platter of a record player by a mass of 0.5 kg and radius 0.12 m is spinning with an angular speed of 5 rad/s. The rotational inertia of the platter about its axis of rotation is 3.60x10^-3 kg*m^2. If you touch the outer edge of the platter and apply a frictional force of 0.8N, how long i will it take for the platter to come to rest? Other than your hand, suppose no external torques act on the platter.
Light travels at a speed of about 3.0 10^8 m/s. How many miles does a pulse of light travel in a time interval of 0.1 s, which is about the blink of an eye
A rifle is meant horizontally at a target 47 m away. The bullet hits the target 2.5 cm below the aim point. What was the bullet's flight time? What was the bullet's speed as it left the barrel?
Two acrobats are balanced on a very thin rod spinning atop a thin pole. The first acrobat is 45.0 kg at a distance of 2.50 meteres from the pole. What is the moment of inertia of the system
A 9.95 kg monkey is hanging by one arm from a branch and swinging on a vertical circle. find he magnitude of the centripetal force acting on the monkey
snow is falling vertically at a constant speed of 9.0 ms. at what angle from the vertical do the snowflakes appear to
A box of 20 kg is pushed up a 15 degree frictionless incline plane at a uniform speed. The applied force on the box is directed at a 20 degree angle from the horizontal. Draw a force diagram for the box.
A window air-conditioner unit absorbs 9.70×104J of heat per minute from the room being cooled, What is the energy efficiency rating of the unit
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. How much space now exists between each rail
An open organ pipe (i.e., a pipe open at both ends) of length Lo has a fundamental frequency Fo, what is the new fundamental frequency
A state trooper chases a speeder along a straight stretch of road;both vehicles move at 160 km/h. What is the Doppler shift in the frequency heard by the speeder
the drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. surface 1 has
Three charged particles are arranged on corners of a square as shown in the figure below, with charge, What is the direction of the electric field at the upper right corner, which is a point in empty space
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