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An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.2 MJ when the flywheel is rotating at 17,500revolutions per minute. What is the moment of inertia of the flywheel?
kg·m2
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How many electrons pass through the wires connected to the patient
A jet plane flying at a constant speed v at an altitude h = 10 km is being tracked by radar located at O directly below the line of flight. determine the value of r at this instant and the magnitude of the velocity v of the plane
A vibration sensor, used in testing a washing machine, consists of a cube of aluminum 1.50 cm on edge mounted on one end of a strip of spring steel (like a hacksaw blade) that lies in a vertical plane. what is its frequency of vibration
A ball is moved from the origion to (1i + 4j) m, using a force (2i + 6j) N. Calculate the work done by the force
A spring with k=620 N/M is stretched with a tension of 40 N. What is the potential energy of the stretched spring
An aluminum rod is clamped one quarter of the way along its length and set into longitudinal vibration by a variable-frequency driving source. obtain the length of the rod
During a game of football, the ball is kicked by the punter with a speed of 20m/s at an angle of 40 degrees above the horizontal. A player on the other team, standing 50m away, starts running to catch the ball immediately after it is kicked. ASsu..
A flywheel is rotating initially with an angular velocity of 3.0 rad/s clockwise. Sometime later it is rotating with an angular velocity of 8.0 rad/s counterclockwise. What is the direction of the angular acceleration
Sketch the electric field and equipotential lines associated with a 6 coulomb negative charge and a 3 coulomb positive charge. what is the force between the charges
What is velocity curve between two times
A 0.19-kg stone is held 1.4 m above the top edge of a water well and then dropped into it, What is the change in gravitational potential energy of the system from release to reaching the bottom of the well
A 1382-kg car is moving westward with a speed of 21.1 m/s, Find the velocity of the center of mass of the car-truck system
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