+|xBing jie xpaf. ArSC:/Users/HP/Documents/uSjuo/Chapter%2007 %20Homework%20soluti= تمي يزSolutiona. 2.6 kJ; b. 640J54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across asurface with Lu =0.50. Find the work done over a distance of 10 cm by (a) the horizontal force,(b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box?Solutiona. 3.5 J; b. - 2.5 J; c. 1.0 J; d. 1.O J60. A 2.0-kg block starts with a speed of 10 m/s at the bottom of a plane inclined at 37° to thehorizontál. The coefficient of sliding friction between the block and plane is 4; = 0.30. (a) Usethe work-energy principle to determine how far the block slides along the plane beforemomentarily coming to rest. (b) After stopping, the block slides back down the plane. What is itsspeed when it reaches the bottom? (Hint: For the round trip, only the force of friction does workon the block.)Solutiona. 6.06 m; b. 6.56 m/s62. A small block of mass 200 g starts at rest at A, slides to B where its speed is V, = 8.0 m/s,w米172$4&3.VER.T3 19

Answered: Image /qna-images/answer/07419404-56cf-427c-b7ef-55947a6c0b9a.jpg

54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a surface with H, = 0.50. Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box? Solution %3D a. 3.5 J; b.-2.5 J; c. 1.0 J; d. 1.0J

54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a surface with H, = 0.50. Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box? Solution %3D a. 3.5 J; b.-2.5 J; c. 1.0 J; d. 1.0J

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

What is the power of a steam jet 15mm in diameter moving at 750 m/s? Steam condition, 1.4 kg/cm2, dry and saturated (v = 1.256m3/kg). (With drawing to fully understand the question)a) 29.67 kW c) 19.67 kWb) 39.67 kW d) 49.67 kW
7. Two parallel plates separated by 15.5 cm move with a relative velocity of 7 m/s. How much force per unit area is required to maintain the velocity difference if the fluid separating the plates is (a) water with µ = 1 cP (b) SAE 30 motor oil with µ = 200 cP and (c) honey with µ = 10,000 cP?
Air fl ows through a variable-area duct. At section 1, A1 =20 cm2, p1 = 300 kPa, ρ1 = 1.75 kg/m3, and V1= 122.5 m/s.At section 2, the area is exactly the same, but the density ismuch lower: ρ2 = 0.266 kg/m3 and T2 = 281 K. There is notransfer of work or heat. Assume one-dimensional steady flow.(a) How can you reconcile these differences? (b) Find the massflow at section 2. Calculate (c) V2, (d ) p2, and (e) s2 - s1.[Hint: This problem requires the continuity equation.]
3. Given two potential windfarm sites with the following conditions, find the expected wind powerdensity available (per square meter) for each location.a. Site red: sea-level elevation, 10 m/s average wind speed, average temperature 25°Cb. Site blue: 1000-meter elevation, 12 m/s average wind speed, average temperature 20°C
THERMODYNAMICS 0.5 kg/s of an idea gas (molecular weight 30, ratio of specific heats 1.5) is cooled at constant pressure from 500 K to 400 K, without any mechanism for absorbing or producing work. At what rate is heat removed from this gas flow in kW?
THERMODYNAMICS Question 0.5 kg/s of an idea gas (molecular weight 30, ratio of specific heats 1.5) is cooled at constant pressure from 500 K to 400 K, without any mechanism for absorbing or producing work. At what rate is heat removed from this gas flow in kW?
1. The unit velocity head is a. ft-lbf/lbm b. ft-lb/sec c. ft-lbm/ft^3 d. ft-lbf/sec 2. Bernoulli’s equation describes a. kinetic energy balance in laminar flow b. mechanical energy balance in boundary layer c. mechanical energy balance in potential glow d. mechanical energy in turbulent flow 3. The continuity equation a. relates work and energy b. is only applicable to liquid c. relates masa flow rate along a stream tube d. stipulates that newtons second law of motion must be satisfied at every point in the fluid
A thermodynamic steady flow system receives 4.56 kg per minute of a fluid work pressure is equal to 1307.90 kilo pascal and specific volume is equal to 0.0388 m3 per kg, speed equals 122 m per second specific internal energy is equal to 17.16 kj/kg. The fluid leaves the system in the boundary where pressure is equal to 551.6 kpa. specific volume is equal to 0.193 cubic meter per kg speed equals 183 m per second and specific internal energy 52.8 kj/kg. Dream passage through the system the fluid receives 3,000 J/s of heat. determine the work in kilojoule per minute.
Please indicate the given, assumption and illustration. A Jet plane having a wing area of 20 m2 and weighing 25 kN flies at 950 km/hr speed. The engine develops 8,500 kW and has a mechanical efficiency of 9%. With the specific weight of air at 12 N/m3, determine the following: A) The Coefficient of Lift (CL). B) The Coefficient of Drag (CD).
A pump 254mm suction pipe and a 127mm discharge pipe is used to deliver 52L/s of water. The suction gage reads 15.6 kPa vacuum and the discharge gage located 100 cm above the suction gage which reads 108 kPa gage. Determine the following: a. the total dynamic head in meters 13.865 14.409 13.415 b. the water power in kW 7.831 7.348 8.245 c. the motor horsepower if the pump efficiency is 66% 15.935 14.924 13.935
27]A flat plate having area 2.5 x 104 cm2 moves at 22.5 m/sec in stationary air of density 1.12 kg/m3. If the co efficient of drag and lift are 0.1 and 0.78 respectively. Determine i] Lift force ii] Drag force iii] The resultant force iv] Direction of resultant v] Power exerted by air on the plate
10. A thermodynamic steady flow system receives 4.56 kg per min of a fluid where, P1=137.90 kPa, v1=0.0388 m^3/kg, ϑ1=122 m/s, and u1=17.16 kJ/kg. The fluid leaves the system at a boundary where P2=551.6 kPa, v2=0.193 m^3/kg, ϑ2=183 m/s, and u2=52.80 kJ/kg. During passage through the system the fluid receives 3000 J/s of heat. Determine the work in kJ/min.