The force Pis applied to the 57-kg block when it is at rest. Determine the magnitude and direction of th friction force exerted by the surface on the block if (a) P = 0, (b) P = 278 N, and (c) P = 405 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are u, = 0.30 and Hg = 0.27, respectively. The friction force is positive up the incline, negative if down the incline. 57 kg 27° H.= 0.30 H = 0.27 19 Answers: (a) F= i ! N (b) F= i ! N (c) F = !N (d) P= i ! N

The force Pis applied to the 57-kg block when it is at rest. Determine the magnitude and direction of th friction force exerted by the surface on the block if (a) P = 0, (b) P = 278 N, and (c) P = 405 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are u, = 0.30 and Hg = 0.27, respectively. The friction force is positive up the incline, negative if down the incline. 57 kg 27° H.= 0.30 H = 0.27 19 Answers: (a) F= i ! N (b) F= i ! N (c) F = !N (d) P= i ! N

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

• Draw a free body diagram of the box on the incline. . Determine the weight (W) of the box on the incline surface. Determine the normal force (N) acting on the inclined box. Determine the friction force (F) acting on the inclined box. ● 7. A box of unknown weight is being pulled on a = 39 degree inclined surface by a frictionless pully system attached to a 540 pound box hanging off the pully. The coefficient of static friction between the box and the inclined surface is μ = 0.33 and both boxes are not moving. Answer the questions below: ● W= N = Ff= 0 W lbs lbs lbs 540 lbs
The 449-N force is applied to the 81-kg block, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the block. The force is positive if to the right, negative if to the left.
The force P = 150 N is applied to the 50-kg crate, which is stationary before the force is applied. Take ? = 30 Coefficient of static friction ?? = 0.3 and coefficient of kinetic friction ?? = 0.25 Determine the magnitude of the normal force, which is acting on the box. Express your answer in N to three significant figures. Do not include the units.
The force P is applied to the 61-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 239 N, and (c) P = 387 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are us = 0.27 and μ = 0.24, respectively. The friction force is positive if up the incline, negative if down the incline. Answers: (a) F= 61 kg 16° i (b) F= i (c) F= i (d) P= i 25 H₂ = 0.27 H = 0.24 z z z N
The crate, which has a mass of 140 kg, is subjected to the action of the three forces shown in the figure. If it is originally at rest, determine the friction force when Py =750 N, P, =900 N, P;=500Nand 6 = 259 Assume the coefficient of kinetic friction between the crate and the surface is pi = 0.40.
2. The 100 – Ib force acts as shown on a 300 - Ib block placed on an inclined plane. The coefficients of friction between the block and the plane are us = 0.25 and Hk = 0.20. Determine whether the block is in equilibrium, and find the value of the friction for the friction force. 300 Ib 100 lb
The 114-kg crate of the figure below is being moved by a rope that passes over a smooth pulley. The coefficient of friction between the crate and the floor is 0.4. If h = 4 m, determine the force P necessary to produce impending motion in N. 2 m 5 m h
The man pushes on the roller with force P through a handle that connects to the central axle of the roller. If the coefficient of static friction between the 43-lb roller and the floor is g = 0.16, determine the maximum force P that can be applied to the handle, so that roller rolls on the ground without slipping. Assume the roller to be a uniform cylinder. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point, and proper unit. Take g = 32.2 ft/s². Your Answer: Answer 30° units 1.5 ft
A 8.0 m long ladder AB leans against a smooth wall making an angle of 70º with the floor. The ladder is uniform and has a mass of 40.0 kg.(a) Determine the forces exerted on the ladder by the floor and the wall (i.e. at A and B respectively).(b) Determine the minimum value of the coefficient of static friction to prevent the ladder from slipping.
A 1.6-kg sphere S is being moved in a vertical plane by a robotic arm. When the angle e is 38, the angular velocity of the arm about a horizontal axis through O is 55 deg/s clockwise and its angular acceleration is 205 deg/s² counterclockwise. In addition, the hydraulic element is being shortened at the constant rate of 440 mm/s. Determine the necessary minimum gripping force Pif the coefficient of static friction between the sphere and the gripping surfaces is 0.51. Compare Pwith the minimum gripping force P; required to hold the sphere in static equilibrium in the 38° position. 1.5 m Answers: P = i Ps= i
Determine the magnitude of the friction force (assume down and to the right is positive). The mass of the block is 10.7 kg. The force P is 219 N. Hs = 0.35 HK = 0.25 30° P
The dresser has a weight of 80 lb and is pushed along the floor as shown in (Figure 1). Assume h = 3.5 ft. The coefficient of static friction at A and B is μ = 0.28 and the coefficient of kinetic friction is μ = 0.2. Figure 2.5 ft A -1.5 ft-1.5 ft- B < 1 of 1 Part A Determine the smallest horizontal force P needed to cause motion. Express your answer in pounds to three significant figures. VE ΑΣΦ 41 Ivec P= 30.0 Submit Part B X Incorrect; Try Again; 2 attempts remaining a = Submit Part C Previous Answers Request Answer If force P is increased slightly, determine the acceleration of the dresser. Express your answer in feet per squared second to three significant figures. Enter positive value if the acceleration is to the right and negative value if the acceleration is to the left. VE ΑΣΦ 11 Ivec ↑ NA. NB = Request Answer IVE ΑΣΦ | 11 ? vec lb ? Also, what are the normal reaction at A and B when it begins to move? Express your answers in pounds using three significant figures separated…