The force Pis applied to the 52-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 = 165 N, and (c) P = 265 N. (d) What value of Pis required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are u, = 0.20 and Hg = 0.15, respectively. The friction force is positive if up the incline, negative if down the incline.

The force Pis applied to the 52-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 = 165 N, and (c) P = 265 N. (d) What value of Pis required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are u, = 0.20 and Hg = 0.15, respectively. The friction force is positive if up the incline, negative if down the incline.

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

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
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
A steel ramp is used by a worker in a factory to move a cardboard box. The box weighs 40 lb with a center of gravity at point G, the force applied by the worker is parallel to the ramp and the coefficient of friction between the box and ramp is μs = μk = 0.3. Determine the value of the normal force N. Determine the force the worker must apply to slide the box up the ramp. Determine the friction force F acting between the ramp and the box if the worker slid the box up the ramp. Determine the force the worker must apply to slide the box down the ramp. Determine the friction force F acting between the ramp and the box if the worker slid the box up the ramp.
The block has a mass of 140 kg and rests on a surface for which the coefficients of static and kinetic friction are Hs = 0.5 and uj. = 0.4, respectively. (Figure 1) Part A If a force F = (60t2 ) N, where t is in seconds, is applied to the cable, determine the power developed by the force when t = 5 s. Hint: First determine the time needed for the force to cause motion. Express your answer to three significant figures and include the appropriate units. µA ? P = Value Units Figure 1 of 1 Submit Request Answer Provide Feedback Next >
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.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part A 10-ft beam, weighing 1240 lb, is to be moved to the left onto the platform. A horizontal force P is applied to the dolly. which is mounted on frictionless wheels. The coefficients of friction between all surfaces are Us=0.30 and Uk=0.25, and initially, x=2 ft. The top surface of the dolly is slightly higher than the platform. -10 ft- D 2 ft B Determine the force P required to start moving the beam. (Hint: The beam is supported at A and D) The force P required to start moving the beam is lb.
11:Y a 36.ll OMANTEL moodle1.du.edu.om/mo The crate, which has a mass of 125 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 P1 = 500 N, P2 = 700 N, P3 = 800 N and 0 = 45°. Assume the coefficient of kinetic friction between the crate and the surface is Hk = 0.40. P2 P1 → P3 Select one: a. 436.94 N b. 215.68 N c. 302.91 N O d. 143.92N العربية الإنجليزية II
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 friction coefficients between the wooden crate and the inclined plane are indicated in the drawing, respectively. Determine (a) the friction force F acting on the crate when force P is 200 N to the block at rest, (b) the force P needed to begin motion up the incline from rest, and (c) the friction force F acting on the block when force P is 600 N.
The force Pis applied to the 52-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 = 184 N, and (c) P = 245 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 ug = 0.20 and µ = 0.16, respectively. The friction force is positive if up the incline, negative if down the incline. 52 kg 21° H, = 0.20 H = 0.16 13 Answers: (a) F= i N (b) F = i N (c) F= i N (d) P= i N