A particle is to move in an xy plane, clockwise around the origin as seen from the positive side of the axis. In unit-vector notation, what torque acts on the particle if the magnitude of its angular momentum about the origin is a) 4.0 kg m²/s b) +².4.0 kg m²/s³ c) √√4.0 kg m²/s d) 4.0 kg m² s/t²?
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solve for b) and c) please
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