behind‚ that of the rotating stator flux in order for current to be induced into the rotor. If an induction motor rotor were to achieve synchronous speed‚ no lines of force would cut through the rotor‚ so no current would be induced in the rotor and no torque would be developed.) Synchronous motors have the following characteristics: • • A three-phase stator similar to that of an induction motor. Medium voltage stators are often used. A wound rotor (rotating field) which has the same number of poles as
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ball’s angular momentum points in the direction of its long axis. At same time due to air drag‚ torque is pointing perpendicular to the angular momentum. The ball travels on a semi-parabolic curve and wind torque produces a small change in the ball’s angular momentum. This allows the ball to continue to turn around its trajectory. Therefore spinning stabilizes the football through angular momentum and torque. Throwing in this manner orientates the ball giving it the smallest possible cross sectional
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FA = (0.205kg x 9.8) - (.0693kg x 9.8) = 2.01 - .679 FA = 1.33 N Conclusion: Since the distance of FB is greater than that of FA‚ the torque of FB is larger. The line of FA‚ lies directing on the 0.2 m axis‚ causing a torque of zero for FA. The theoretical and experimental values for both forces are very close‚ supporting the theory of torque and parallel
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which shows the measured value. Working: When a current flow through the coil‚ it generates a magnetic field which is proportional to the current in case of an ammeter. The deflecting torque is produced by the electromagnetic action of the current in the coil and the magnetic field. The controlling torque is provided by two phosphorous bronze flat coiled helical springs. These springs serve as a flexible connection to the coil conductors. Damping is caused by the eddy current set up in the
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A hockey player impels himself forward by pushing off the ice with a power opposite to the skate sharp edge. Since the contact of the edge with the ice is just about zero‚ this is the main way he can impel himself forward. The figure underneath represents the material science behind this guideline. As the hockey player pushes off with his back leg‚ an opposite power F is applied on the skate by the ice. The part of the power F that focuses forward (toward movement) is the thing that pushes the player
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ball. This allows the fielder to get their glove in front of the ball and field the ball quickly. Rotary or Angular Kinematics. A significant amount of force is placed on the right‚ non-glove side‚ knee during the drive step. This is classified as torque on the knee because of the amount of force being placed
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The engine makes 420 horsepower and 420 pounds-foot torques. The Cherokee is powerful enough to get from zero to sixty miles per hour in 4.7 seconds. The Jeep takes 136 ft. to stop from zero to sixty. The Range Rover Sport is a super 4.2 liter Range Rover with a supercharge. The Sport can go from zero to sixty in 6.82 seconds‚ just two seconds shy of the Cherokee. The supercharge in the engine makes 320 horsepower and 410 pound-foot torque. In the break test‚ the Range Rover stops from zero
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suggested were: 1. Reduce the price of DMC’s 10 HP power to that of 7 and a half motor. 2. Reengineer DMC’s present motor. 3. Bring up a specific definite purpose motor for oil pumping market. 4. Persuade Bridges regarding the maximum torque. Questions: 1. What do we really know about this situation? 2. Is this just a ‘brush-fire’—or an important problem? 3. How profitable is each of the four alternatives suggested? 4. What other considerations are there in planning
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very efficient turbine. Contents [hide] * 1 Function * 2 Applications * 3 Design rules * 4 Turbine physics and derivation * 4.1 Energy and initial jet velocity * 4.2 Final jet velocity * 4.3 Optimal wheel speed * 4.4 Torque * 4.5 Power * 4.6 Efficiency * 5 System components * 6 See also * 7 References * 8 External links | ------------------------------------------------- [edit]Function The water flows along the tangent to the path of the runner.
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having two propellers in a contra- rotating configuration. Contra-rotating‚ also referred to as coaxial contra-rotating‚ is a technique whereby parts of a mechanism rotate in opposite directions about a common axis‚ usually to minimize the effect of torque. Examples include some aircraft propellers‚ resulting in the maximum power of a single piston or turboprop engine to drive two propellers in opposite rotation. Contra-rotating propellers are also common in some marine transmission systems‚ in particular
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