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A frictional force of 320 N acts on the rim of a 1.4 m diameter wheel to oppose its rotational motion. What is the torque about the wheel's central axis? (Take positive torques to be in the direction of rotation.)
what is the derivative of position as a function of time? what is the derivative of velocity as a function of time
A steel wire of length 1.92 with circular cross section must stretch no more than 0.300 when a tensile (stretching) force of 410 is applied to each end of the wire. What minimum diameter is required for the wire
A mass of 6.70 kg is suspended from a 1.15 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
A mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.56 cm. If the spring constant is 237 N/m and the mass is 0.400 kg; Determine the mechanical energy of the system
A portable x-ray unit has a step-up transsformer, the 120 V input of which is transformed to the 100kV output needed by the x-ray tubr, what is the number of loops in the secondary
Two converging lenses are used in a particular device. The first lens (the one closest to the object) has a focal length of 200 mm. Find the distance of the final image along with its magnification
what magnitude of horizontal force must the person apply to keep it moving with constant velocity? c) If the person continued to push with the force used to start the motion, what would be the acceleration of the trunk.
A circular saw blade 0.250m in diameter starts from rest. In 7.50s , it reaches an angular velocity of 140rad/s with constant angular acceleration. Find the angular acceleration and the angle
A computer disk drive is turned on starting from rest and has a constant angular acceleration. How long did it take to make the first complete revolution
Let all the three charges be placed at the center of a tetrahedron, composed of four triangular faces of equal area. Calculate the net flux through each surface
A 110 granite cube slides down a 45 degree frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 235 steel cube at rest. How high above the table should the granite cube be released to give the steel cube a..
What are the velocities of the two people after the snowball is exchanged. What is the greatest kinetic energy of the electrons removed from the cathode by this light.
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