Answered: The elevator of a large building is to…

The elevator of a large building is to raise a net mass of 400 kg at a constant speed of 12 m/s using an electric motor. Find the minimum power rating of the motor. Answer 47 kW won W :nodulo?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Asap please
A hydraulic elevator is lifting two women, a child, and a cat at a rate of 50 ft/min. If their combined mass is 282 Ibm and the mass of the elevator is 1250 lbm, what is the minimum power rating required? Express this quantity in units of Watts. The elevator is 78% efficient.
1 For the car lift shown in the figure, determine the force required to be applied (F1), for the following cases: (i)A1 = 0.1 m2 and A2 = 0.25 m2 (ii)A1 = 0.05 m2 and A2 = 0.25 m2 Take mass of the car as 1500 kg.
Hamdan Auto uses bydraulic press to raise 3500 kg truck. If the area of the input piston is 10 cm and the area of the other piston is 540 cm, what force (in N) must be 556 p o Tapplied a the input piston to lin the truck 763 A O 545 BO 778CO 30EO 648FO
3-41 Consider a fan located in a 1 m X 1 m square duct. Velocities at various points at the outlet are measured, and the average flow velocity is determined to be 7 m/s. Taking the air density to be 1.2 kg/m³, estimate the minimum electric power consumption of the fan motor.
An electric motor drives a compressor by use of V-belt. The pulley diameter of the compressor shaft is 1.2 meter while the pulley diameter of the motor shaft is 1 meter. The belt speed runs at 30 m/s. The center distance between pulleys is 1.75 m. The groove angle of the pulleys is 35%. Determine the power generated in kW if the tension at the tight side of the belt is 670.5 N. The coefficient of friction between the belt and the pulley is 0.27.
In a belt transmission dynamometer, the distance between the center of driving pulley and the dead weights is one meter. Determine the value of dead weights required to keep the lever in horizontal position, if the power transmitted is 7.5 kW and the diameter of each of the driving pulley as well as the intermediate pulleys is equal to 40 cm. The driving pulley runs at 500 r.p.m.
A wind turbine has a rotor diameter of 33 m (blade length of ~16.5 m) and an efficiency (power coefficient) of 29%. It is generating electricity in winds moving at 12.2 m/s and with an air density of 1.225 kg/m3. How much power is it generating in units of kilowatts (kW)?
A platform supported by 4 parallel springs: 2 long and 2 short springs, have a spring constant of 7.30 kN/m and 10.95 kN/m. A 55 kg box is dropped onto it from a height of 1.5m. Find the compression of each spring if the short springs are 0.1m shorter than the long springs.
The heat engine in the figure receives 1 MW of energy from the high temperature heat well. Heat The temperature of its source is 550 ° C. Some of the energy received by the heat machine is 300 K heat at the temperature of the well. Power generated by heat machine 450 KW . Calculate how much energy the heat machine puts into the heat well. In addition, the thermal Calculate the efficiency of this efficiency with the efficiency in the case of a Carnot machine. compare. Interpret the result with the reasons
A refrigerator has a coefficient of performance of 2.50, requires 150 W of electrical power to operate, and maintains a temperature of -4.00 °C within its interior compartment. How long would it take to cool a dozen 1.00 L of water in a plastic wrapper from 33.0 °C to -4.00 °C in this refrigerator? Any heat escaping the plastic should be ignored. Remember that 1.00 g/cm3 is the density of water.