The resistance to motion isgiven byR, = (0.011 + 0.000 06 V) Mg+ 0.028 AV²%3Dwhere M is the mass in kg, V is the velocity inkm/h and A is the frontal area in m².A jeep of 1400 kg mass and 2.4-m² frontalarea is used to pull a trailor with a gross mass of800 kg at 50 km/h in top gear on level road. If thejeep is capable of developing 40 kW of power forpropulsion, find whether it is adequate for thejob. The transmission efficiency may be taken as92%. Also, find the pull on the coupling at thisspeed.If all the power is used by the loading trailor,determine the pull in the coupling at 50 km/hand the load put on the trailor.

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Answered: The resistance to motion is given by R,…

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

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Q6) (a) Two sites are being considered for wind power generation. In the first site, the wind blows steadily at 7 m/s for 3000 hours per year, whereas in the second site the wind blows at 10 m/s for 2000 hours per year. Assuming the wind velocity is negligible at other times for simplicity; determine which a better site is for wind power generation. Hint: Note that the mass flow rate of air is proportional to wind velocity. (Take the density of air to be ? = 1.25 kg/m3).
What is the mass of an object that falls freely under the influence of gravity from an elevation of 100 m above the earth's surface? The downward velocity is 100 m/s and strikes the earth at 109.4m/s. Take g = 9.81 m/s2.
A system has a mass velocity of 0.5 kg/s. The enthalpy, speed and height at the entrance of the system are worth respectively 55.6 Kcal/kg, 30 m/s and 90 m. At the exit, the new values of enthalpy, speed and height are 55 Kcal/kg, 0.30 m/s and -3 m. 2.5 Kcal/s are communicated to the system. What amount of work is done by the system: a) per kg of fluid, b) per minute, c) expressed in horsepower?
A golf player hits a 0.045 kg golf ball that is initially at rest, changing its momentum by 4.2 kg-m/s. What is the final speed of the golf ball? *
1. The value of the total mass flow (mo). (in kg/s)2. 2. The value of the thrust produced. (in Newton)
Radiation heat transfer occurs at a speed of: (a) Sound (b) Light (c) 60,000 km/hr (d) 350 m/s
How can you define impulsive force in terms of momentum.
A cargo truck weighing 2,700 kg accelerates from 3.5 m / s to 6.2 m / s in 12.0 seconds applying a constant force. What change does the momentum experience? b. What is the intensity of the force exerted?
A 9-m-diameter hot air balloon is neither rising nor falling. The density of atmospheric air is 1.3 kg/m3. The total mass of the balloon including the people on board is (a) 496 kg (b) 458 kg (c) 430 kg (d ) 401 kg (e) 383 kg
1) Air with a density of 0.45 kg/m3 enters an experimental jet engine at a rate of 175 m/s. The inlet area of the engine is 7.0 ft2. After fuel is burned, the air and combustion byproducts leave the engine with a velocity of 695 m/s through an outlet area of 6.0 ft2. What is the average density of the gas exiting the engine? Express your answer in kg/m3, slugs/ft3, and lbm/ft3. 2) Calculate the mass moment of inertia of the thin ring shown in the accompanying diagram. Express your answer in lbm · ft2, lbm · in2, and slugs · ft2. (Assume the axis of rotation is into the page through the center of the ring.) m = 0.8 slugs radius is 9 in.
Air with a density of 0.45 kg/m3 enters an experimental jet engine at a rate of 175 m/s. The inlet area of the engine is 7.0 ft2. After fuel is burned, the air and combustion byproducts leave the engine with a velocity of 695 m/s through an outlet area of 6.0 ft2. What is the average density of the gas exiting the engine? Express your answer in kg/m3, slugs/ft3, and lbm/ft3.
An airplane with a 1.8m diameter propeller travels in still air with a density of 1.14 kg/m3 at 85m/s. is doing. The speed of the air passing through the propeller is 115 m/s relative to the plane. a) the thrust on the aircraft, b) theoretical horsepower required to turn the propeller, c) propeller efficiency, and d) across the blade Determine the pressure difference.

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