Find the mass of the worker
A worker stands still on a roof sloped at an angle of 39° above the horizontal. He is prevented from slipping by a static frictional force of 440 N. Find the mass of the worker.
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A positively charged particle of mass 6.00 10-8 kg is traveling due east with a speed of 25 m/s and enters a 0.46 T uniform magnetic field. What is the magnitude of the charge of the particle?
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