What is the mechanical power delivered by the constant force

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Q. A person with perfect pitch sits on a bus bench listening to the 442 Hz horn of an approaching car. If the person detects a frequency of 479 Hz, how fast is the car moving?

Q. A conducting rod of length l moves on two horizontal frictionless rails, as in the figure below. A constant force of magnitude 1.00 N moves the bar at a uniform speed of 2.00 m/s through a magnetic field vector B that is directed into the page. (a)What is the current in an 8 ohm resistor. (b)What is the rate of energy dissipation in the resistor? (c)What is the mechanical power delivered by the constant force?

Reference no: EM1355411

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