(c) (1) Briefly define power and efficiency? (ii) Calculate the power of force F exerted on the 15 kg block shown in Figure Q.4(c) if the block is travelling at a constant velocity v = 6 m/s with a displacement of s = 0.8 m. The coefficient of kinetic friction µg = 0.6 and the spring is originally stretched at 0.1 m. F k = 2 kN/m- | 45° Figure Q.4(c)

(c) (1) Briefly define power and efficiency? (ii) Calculate the power of force F exerted on the 15 kg block shown in Figure Q.4(c) if the block is travelling at a constant velocity v = 6 m/s with a displacement of s = 0.8 m. The coefficient of kinetic friction µg = 0.6 and the spring is originally stretched at 0.1 m. F k = 2 kN/m- | 45° Figure Q.4(c)

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

quick Problem 5. A F = 2 N Slider AC of mass 0.5 kg moves along a frictionless -> horizontal guide under the action of a constant force F = 2N. A uniform slender rod AB of mass 0.25 60° kg and length 1 m is pinned to slider AC by means of a frictionless pin at point A and a thin wire at point B. Find the tension in the wire when released from wire rest. Ans: Ax = 0.1460, Ay = 1.5507, T = 1.0413 Newtons B.
Consider the mass-spring system with frictionless sliding. With the forcing function f(t) as described, calculate x(5,9)? k =718 N/m, m = 268 kg, fi = 675 N, tį = 3,1 s, t2 = 8,7 s f(t) fi x(t) f(t) k wwww m no-friction m no-friction t1 t2
A 4.0 kg mass, ml, hangs from a rope that runs over a massless frictionless pulley and is connected to a 6.0 kg mass, m2, resting on the surface at an incline of 0= 350, as shown in Figure (1). The coefficient of static friction between the incline and m2 is 0.09, and the coefficient of kinetic friction is 0.07. Initially, the system is at rest. Calculate (a)the acceleration of the masses (b) the tension in the string. pulley m2
2.0 kg push 45° Problem 4: (a) The 2 kg wood box in the Figure above on the left slides up a vertical wood wall while you push on it at a 45° angle. The coefficient of kinetic friction for wood on wood is Hk = 0.2. What magnitude force Fpush should you apply to cause the box to slide up at a constant speed? Recall that constant speed means a = 0 m/sec?. Answer: 34.6 N. (b) Let's re-do part (a), but with the box now sliding down the vertical wood wall while you push on it at a 45° angle. Hk is still Hk = 0.2. What magnitude force Fpush should you apply to cause the box to slide down at a constant speed? Recall that constant speed means a = 0 m/sec?. Answer: 23.1 N. Problem 5: The Figure shows two blocks connected by a cord (of negligible mass) that passes over a frictionless pulley (also of negligible mass). The arrangement is known as Atwood's machine. One block has mass mi = 1.3 kg; the other has mass m2 = 2.8 kg. What are: (a) The magnitude of the blocks' acceleration. Answer: 3.6…
The controlling force curve of a spring controlled governor is a straight line. The weight of each governor ball is 40 N and extreme radii of rotation are 10 cm and 17.5 cm. If the values of the controlling force at above radli are 205 N and 400 N respectively and friction of mechanism is equivalent to 2.5 N at each ball. Find The extreme equilibrium speeds of the governor. (1) The equilibrium speed and coefficienct of insensitiveness at a radius of 15 cm
Given that the slot (for the cord) in the cylinder with 17.6 kg in the figure below has a negligible effect on Ic, find the time required for C to move 3.7 m down the incline if 0 = 55°. R = 1.4 m,r = 0.6 m, and u = 0.11. Cord R Figure is from "Engineering Mechanic An Introduction to Dynamics", McGill and King.
A block of mass m, = 4.00 kg and a block of mass m, = 6.00 kg are connected by a %3D massless string over a pulley in the shape of a solid disk having radius R = 0.250 m and mass M = 5.0 kg. These blocks are allowed to move on a fixed block-wedge of angle 0 = %3D 30.0° as in figure. The coefficient of kinetic friction is 0.250 for both blocks. Determine the acceleration of the two blocks. (g = 9.80 m/s²,I = - MR²) %3D М, R M2 gOnline Sinav Siste...
2 Your answer is partially correct. Try again. In the figure, a slab of mass m, = 40 kg rests on a frictionless floor, and a block of mass m, = 9 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. A horizontal force F of magnitude 102 N begins to pull directly on the block, as shown. In unit-vector notation, what are the resulting accelerations of (a) the block and (b) the slab? u = 0- (a) Number T-7.4 -7.4 Units m/s^2 (b) Number i+ Units m/s^2 -0.88 Click if you would like to Show Work for this question: Open Show Work SHOW HINT LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE 10:50 PM search ENG 4/4/2021 ond 111Pgup) pri sc DOUSE insert dele home break 13) 23 bac 3 5. 4 R.
Example 4 A block of m connected to a ball of mass m, by a lightweight cord over a lightweight, frictionless pulley as shown in figure. A force of magnitude F at an angle 0 with the horizontal is applied to the block as shown and the block slides to the right. The coefficient of kinetic friction between the block and surface is nass m, on a rough, horizontal surface is Hr. Find the magnitude of acceleration of the two objects. a m1 a Dr. Hazem Falah Sakeek 18 www.
Consider the system shown in the figure with m1 = 20.0 kg, m2 = 12.5 kg, R = 0.200 m and the mass of the pulley M = 5.00 kg. Object m2 rests on the ground and object m1 is 4.00 m above the ground when released from rest. The pulley shaft is frictionless. The rope is light, does not stretch and does not slip on the pulley. (a) Calculate the time interval required for m1 to hit the ground. (b) How would your answer change if the pulley had no mass?
Question A 4.0 kg mass, ml, hangs from a rope that runs over a massless frictionless pulley and is connected to a 6.0 kg mass, m2, resting on the surface at an incline of 0 = 350, %3D as shown in Figure (1). The coefficient of static friction between the incline and m2 is 0.09, and the coefficient of kinetic friction is 0.07. Initially, the system is at rest. Calculate (a)the acceleration of the masses (b) the tension in the string. pulley m2 m Fig. 1
Q2 A flat belt type is used for a belt drive system connecting two pulleys 1.2m apart. The driver pulley with diameter 40 cm is rotating with the speed 350 rpm, while diameter of driven pulley is 100 cm. Coefficient of friction of the contact surface between belt and pulley is 0.3. Maximum allowable tension is 600N. (i) Find the power transmitted by the belt, P. (ii) Determine the Initial tension of the belt, TA. (iii) If the flat belt is now replaced by a Vee-belt with groove angle of B = 30°, find the power transmitted by this belt. Give explanation why power transmitted by flat and Vee-belt type are not the same. Explain your answer according to basic friction concept.