Consider the system shown in the accompanying figure. Between the wall and thebig box there is friction, also between the boxes there is friction.What is the correct number of forces acting on box 1 and box 2 respectively?Note: The force of magnitude F exerted by the person is a different force than theforces of magnitudes F1 and F2, which come from other people pushing the boxesin the directions shown.m,m2We assume that both boxes move upward together as a single bodya) 5 and 5 forces respectivelyb) 6 and 4 forces respectivelyc) 7 and 4 forces respectivelyd) 6 and 5 forces respectively

Answered: Image /qna-images/answer/994b8798-5606-4788-a023-73bae6330106.jpg

Answered: Consider the system shown in the…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 76PQ: Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to...

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The person in Figure P5.6 weighs 170 lb. As seen from the front, each light crutch makes an angle of 22.0 with the vertical. Half of the persons weight is supported by the crutches. The other half is supported by the vertical forces of the ground on the persons feet. Assuming that the person is moving with constant velocity and the force exerted by the ground on the crutches acts along the crutches, determine (a) the smallest possible coefficient of friction between crutches and ground and (b) the magnitude of the compression force in each crutch. Figure P5.6
You are constructing a mobile out of 5 identical toy helicopters, each of mass m = 18.4 g, 4 identical sticks (each length l = 21.5 cm, and negligible mass), and thin string of negligible mass. The distance from the left-hand side of each stick to the attachment point of the sting supporting it are x1 through x4 respectively, as shown in the diagram. The tensions in the supporting strings are T1 through T4 as shown. You want to design the mobile so that it is in static equilibrium. Part (a) Find the tension in Newtons in the string T1. Part (b) Find the tension in Newtons in the string T2. Part (c) Find the tension in Newtons in the string T3. Part (d) Find the tension in Newtons in the string T4. Part (e) Find the distance x1, in centimeters . Part (f) Find the distance x2, in centimeters. Part (g) Find the distance x3, in centimeters. Part (h) Find the distance x4, in centimeters.
The system shown in the figure below has an acceleration of magnitude 1.15 m/s2, where m1 = 4.30 kg and m2 = 9.40 kg. Assume that the coefficient of kinetic friction between block and incline is the same for both inclines. a) Find the coefficient of kinetic friction. b) Find the tension in the string.
Consider Figure P2-10 on P. 37 of your textbook showing two forces applied to a truss. Assume the 400 N acts along the + x-axis. a) Find the magnitude of the resultant force acting at point B. b) What is the angle © between the resultant force and the + x-axis?
Figure shows a block of mass m resting on a 20∘ slope. The block has coefficients of friction μs = 0.80 and μk = 0.47 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. a) What is the minimum mass m that will stick and not slip? Express your answer to three significant figures and include the appropriate units. b) If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have? Express your answer to three significant figures and include the appropriate units.
The two blocks (m =16 kg, M =88 kg) in Fig. are not attached to each other. The coefficient of static friction between the blocks is µs =0.38, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal force required to keep the smaller block from slipping down the larger block?
Two blocks are stacked as shown. The blocks and the table are all of the same material; the coefficients of friction are μ s = 0.39 and μ k = 0.21. A horizontal force FA is applied to the lower block. The masses of the top and bottom block are 2.7 kg and 5.4 kg, respectively. Determine the maximum value of FA that can be applied without the top block slipping. (Answer in N.)
The two blocks (m = 13 kg and M = 90 kg) in the figure are not attached to each other. The coefficient of static friction between the blocks is μs = 0.44, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal force F required to keep the smaller block from slipping down the larger block?
The figure below shows a bird feeder that weighs 177.7 N. The feeder is supported by a vertical wire, which is in turn tied to two wires, each of which is attached to a horizontal support. The left wire makes a 60° angle with the support, while the right wire makes a 30° angle. What is the tension in each wire (in N)? left wire= ? N right wire= ?N bottom wire= ?N
The sprinter from problem 9 is now out of the blocks and running. If the coefficient of static friction between the track shoe and the track is 0.80, and the sprinter exerts a vertical force of 2000 N downward on the track, what is the maximum horizontal force he can generate under his shoe?
The figure below shows a bird feeder that weighs 158.9 N. The feeder is supported by a vertical cable, which is in turn tied to two cables, each of which is attached to a horizontal post. The left cable makes a 60° angle with the post, while the right cable makes a 30° angle. What is the tension in each cable (in N)? left cable N Right cable N bottom cable N
Unlike most of the other muscles in our bodies, the masseter muscle in the jaw, as illustrated in the figure, is attached relatively far from the joint, enabling very large forces to be exerted by the back teeth. This is shown in the figure below, where a person is biting down on a bullet placed between the back teeth. (FM= 210 N and rR = 4.1 cm.) (a) Using the information in the figure, calculate the magnitude of the force exerted by the teeth on the bullet. (b) Calculate magnitude of the force on the joint.

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