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A 2.90 x 102 Newton force is pulling a 90 kilogram refrigerator across a horizontal surface. The force acts at an angle of 17.0Â degree above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 8 meter.
(a) Compute the work done by the pulling force.
______ J
(b) Evaluate the work done by the kinetic frictional force.
_______J
Ball A is attached to one end of a rigid massless rod, while an identical ball B is attached to the center of the rod, Find the tension in each half of the rod
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he rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 2000 MeV. Find the speed of the proton
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