45 kg B O 36 k PROBLEM 12.17 Boxes A and B are at rest on a conveyor belt that is initially at rest. The belt is suddenly started in an upward direction so that slipping occurs between the belt and the boxes. Knowing that the coefficients of kinetic friction between the belt and the boxes are (k)= = 0.30 and (k)=0.32, determine the initial acceleration of each box. аA = 0.304 m/s²15° ag=0.493 m/s² 15⁰

45 kg B O 36 k PROBLEM 12.17 Boxes A and B are at rest on a conveyor belt that is initially at rest. The belt is suddenly started in an upward direction so that slipping occurs between the belt and the boxes. Knowing that the coefficients of kinetic friction between the belt and the boxes are (k)= = 0.30 and (k)=0.32, determine the initial acceleration of each box. аA = 0.304 m/s²15° ag=0.493 m/s² 15⁰

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

When Crates A and B of mass ma = 31 kg and mB = 78 kg are released from rest, Crate A moves to the right on a rough surface (u = 0.4 ). The force P = 20 Newtons is always acting on Crate B. The linear spring has a stiffness of k = 490 N and is initially stretched 0.4 meters before the system is released from rest. Neglect the mass of the pulleys and cables and neglect friction in the pulley bearings. Determine the work done by the weight of Crate B (in Joules) when Crate A has moved a distance of 0.8 meters to the right. Consider g = 10 m. 82 B
(a) Two blocks are joined by an inextensible cable as shown in Figure. If the system is released from rest, determine the velocity of block A after it has moved 2 m by using the data given. Assume that the coefficient of kinetic friction between block A and the plane is ?k = 0.25 and that the pulley is weightless and frictionless.
5. Three blocks are connected over two frictionless, massless pulleys by two inextensible, massless cords as shown in the figure. There is friction between block m and the horizontal surface of the table. If the block m, moves downward after being released from rest, then what is the magnitude of the acceleration of the blocks and the magnitude of the tension in the cords in terms of the masses of the blocks m, , and ms, the coefficient of kinetic friction between block my and the table, a. and the acceleration due to gravity, g. Include a force diagram or free-body diagram of the situation.
A 100-kg box is towed to move horizontally from rest by a constant force P=200 N. The kinetic friction is μk =0.1. The angle of the force P is θ=30° with respect to the horizontal direction. The acceleration due to gravity is g=9.81 m/s2. (1) Select the motion of equation along the horizontal direction, where F is the friction force, N is the normal force from the ground, and a is the acceleration.___________ A. Pcos30°-F=0 B. Psin30°-F=ma C. Psin30°-F=0 D. Pcos30°-F=ma
Two objects with masses of 2.55 kg and 4.15 kg are connected by a light string that passes over a light frictionless pulley to form an Atwood machine. (a) Determine the tension in the string. (b) Determine the acceleration of each object. (c) Determine the distance each object will move in the first second of motion if they start from rest.
A force of P = 200 N is applied to block A and causes block A to accelerate to the right on a rough surface as shown in Figure below. Knowing that the mass for block A is 10 kg and the mass for block B is 6 kg. The coefficient of kinetic friction between block A and the surface is 0.15. Pulleys are massless and smooth. A 30° (6 + a) kg 6 kg B Determine the tension in the cable attached to block A. Explain with calculations on the possible way(s) to reduce the acceleration of block B.
Blocks A, B, and C are placed as in the figure(Figure 1) and connected by ropes of negligible mass. Both A and B weigh 25.0 N each, and the coefficient of kinetic friction between each block and the surface is 0.32. Block C descends with constant velocity. Figure B 36,9⁰ 1 of 1 C Part D What is the weight of block C? Express your answer in newtons. VE ΑΣΦ wc = Submit Part E a = Request Answer Submit If the rope connecting A and B were cut, what would be the acceleration of C Express your answer in meters per second squared. V ΑΣΦ Request Answer ? ? N m/s²
The 30-kg disk is originally spinning at w = 115 rad/s. It is placed on the ground, for which the coefficient of kinetic friction is uc = 0.5. Neglect the mass of AB. (Figure 1) Figure 0.5 m 0.5 m 0.3 m B 1 of 1 Part A Determine the time required for the motion to stop. Express your answer to three significant figures and include the appropriate units. t = Submit Part B Value μÃ Request Answer Submit (FAB on A)x: (FAB on A)y= Determine the x and y components of force which the member AB exerts on the pin at A during this time using scalar notation. Express your answers using three significant figures separated by a comma. Units Request Answer ? τΫΠΙ ΑΣΦ 11. vec ↓↑ ? N
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 = 35 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 m- Fig. 1
A spherical bowling ball with mass m = 4.6 kg and radius R = 0.105 m is thrown down the lane with an initial speed of v = 9.5 m/s. The coefficient of static friction between the ball and the ground is 0.35 and the coefficient for kinetic friction is μ = 0.3. Once the ball begins to roll without slipping it moves with a constant velocity down the lane. 1) What is the magnitude of the angular acceleration of the bowling ball as it slides down the lane? 2) What is magnitude of the linear acceleration of the bowling ball as it slides down the lane? 3) How long does it take the bowling ball to begin rolling without slipping? 4) Once it begins to roll without slipping, what is the force of friction on the ball?
A car A is stuck on the railroad tracks as a train B approaches with a speed of 120 km/hr. As soon as the problem is detected, the train's emergency brakes are activated, locking the wheels and causing the train's wheels to slide relative to the tracks. If the co-efficient of kinetic friction between the wheels and the track is 0.2, use work energy principle to determine the minimum distance d at which the brakes must be applied to avoid a collision under the following circumstances. Mass of the train is 195,000 kg. A B d
The boxes in the picture (A has a mass of 1.6kg and B has a mass of 4.4kg) are connected with an unstretchable and massless rope. They are released from rest at a level with an angle θ = 50∘. The coefficient of friction between the boxes is μ = 0.24. Friction between box B and the slide can be ignored. a) What is the amount of frictional force between the boxes? b) What is the magnitude of the acceleration of the boxes? c) What is the rope force?