Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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An elevator has a mass of 800 kg and is built to start with a maximum acceleration of 3m / s2. Determine the maximum mass that the elevator can sustain if the cable can withstand a tension of 20,000 N.
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- ces Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. The elevator E has a weight of 6600 lb when fully loaded and is connected as shown to a counterweight W of weight 2800 lb. Determine the power in hp delivered by the motor when the elevator has an upward velocity of 1 ft/s and a deceleration of 0.18 fus². The power delivered by the motor is [ hp.arrow_forwardI REPEAT. TYPEWRITTEN ONLY ANSWERS DO NOT ANSWER IF YOU ALREADY ANSWERED THIS. DO THIS TYPEWRITTEN ONLY. I'LL UPVOTE DOWNVOTE IF HANDWRITTEN THANK YOU.arrow_forwardQUESTION 11 A small box of mass m is placed on top of a larger box of mass 2m as shown in Figure. When a force is applied to the large box, both boxes accelerate to the right with the same acceleration. If the coefficient of friction (static/kinetic) between all surfaces is u, what would be the magnitude of the force and what would be the acceleration ? m F 2m O 1.3m( µ+ g), g O 2.3µmg, µg O 3. 6umg, µg O 4. The information given in the problem is insufficient.arrow_forward
- SOLVE STEP BY STEP A car m = 200 tons makes the journey shown in the figure, if it moves with an initial speed of 150,000 m/s and the maximum height of the path is 15,000 m and the coefficient of friction is 0.4. Find the work of all the forces that intervene at point a, point b and point c, kinetic energy a, b, c, potential energy a, b, c and the power of the car developed along the trajectory Steps draw the free body diagram, the force diagram and use the appropriate equations to find Kinetic energy at points A, B and C Power energy at points A, B and C Power at points A, B and C ● A B 15000 m Carrow_forward4. A train of total mass 650 t is hauled by a locomotive along a level track at a constant speed of 60 km/h. If the tractive resistance is 85 N/t mass of the train, calculate the power developed at this speed.arrow_forwardThe crane shown in the figure is lifting a 389-kg crate upward with an acceleration of 3.79 m/s². The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 108 kg. The cable is then wound onto a hollow cylindrical drum that is mounted on the deck of the crane. The mass of the drum is 190 kg, and its radius (the same as that of the pulley) is 0.449 m. The engine applies a counterclockwise torque to the drum in order to wind up the cable. What is the magnitude of this torque? Ignore the mass of the cable. Number i Units Pulley- Drum Boomarrow_forward
- The two identical springs below are holding up the mass D. The springs each have a stiffness of 895 N/m. The mass of D is 18.8 kg. What was the unstretched length of the springs in m? A 45° D 45 C B 0.3 marrow_forwardA helicopter with a mass of 10,000 kg takes off straight up at t=0. The thrust of the engine is defined given as a function of time: FT= 95 0.18t- (kN). Where t is in units of seconds. How fast is it rising and what is its elevation at t=4s?arrow_forwardA block of mass 4m can move without friction on a horizontal table. The block is attached to another block of mass m by a string that passes over a frictionless pulley. If the masses of the string and the pulley are negligible, what is the magnitude of the acceleration of the descending block?arrow_forward
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