At the instant = 55°, the boy's center of mass G is momentarily at rest. The boy has a weight of 55 lb. Neglect his size and themass of the seat and cords.Part ADetermine his speed when = 85°.Express your answer to three significant figures and include the appropriate units.U=107SubmitPart BHAofftPrevious Answers Request AnswerT= 39.7secDetermine the tension in each of the two supporting cords of the swing when -85,Express your answer to three significant figures and include the appropriate units.HA?→lbSubmit Previous Answers Request Answer?10 f

Given data as per questionAt θ=55°, the boy's center of mass G is momentarily at rest Weight of boy,…

Answered: At the instant = 55°, the boy's center…

At the instant = 55°, the boy's center of mass G is momentarily at rest. The boy has a weight of 55 lb. Neglect his size and the mass of the seat and cords. 10 f

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.79P: The coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a)...

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It takes 34 s for the 60-Mg tugboat to increase its speed uniformly to 25 km/h, starting from rest. The propeller provides the propulsion force F which gives the tugboat forward motion, whereas the barge moves freely. The barge has a mass of 84 Mg . (A) Determine the force of the rope on the tugboat. Express your answer to three significant figures and include the appropriate units. The answer is not 17145.882 or 12254.12 N
Two identical 16-kg spheres are attached to the light rigid rod, which rotates in the horizontal plane centered at pin Part A: If the spheres are subjected to tangential forces of P = 10 N, and the rod is subjected to a couple moment M=(8t)N⋅mM=(8t)N⋅m, where t is in seconds, determine the speed of the spheres at the instant t = 4 s. The system starts from rest. Neglect the size of the spheres. Express your answer to three significant figures and include the appropriate units.
It takes 34 s for the 60-Mg tugboat to increase its speed uniformly to 25 km/h, starting from rest. The propeller provides the propulsion force F which gives the tugboat forward motion, whereas the barge moves freely. The barge has a mass of 84 Mg . (A) Determine the force of the rope on the tugboat. Express your answer to three significant figures and include the appropriate units. The answer is not 17145.882
The elastic cord has an unstretched length l0 = 1.5 ft and a stiffness k = 12 lb/ft. It is attached to a fixed point at A and a block at B, which has a weight of W = 2.2 lb. The block is released from the rest from the position shown. After leaving the guide, it is launched onto the smooth horizontal plane. (Figure 1) (A) Determine its speed when it reaches point C after it slides along the smooth guide. Express your answer to three significant figures and include the appropriate units. (B) Will the angular momentum of the block about point A be conserved after it passes point C? yes or no. (C) Calculate the magnitude of the angular momentum of the block about point A, at any instant after it passes point C. Express your answer using three significant figures. (D) Determine if the cord becomes unstretched. The cord will not become unstretched The cord will become unstretched
The elastic cord has an unstretched length l0 = 1.5 ft and a stiffness k = 12 lb/ft. It is attached to a fixed point at A and a block at B, which has a weight of W = 2.2 lb. The block is released from the rest from the position shown. After leaving the guide, it is launched onto the smooth horizontal plane. (Figure 1) (A) Determine its speed when it reaches point C after it slides along the smooth guide. Express your answer to three significant figures and include the appropriate units. (B) Will the angular momentum of the block about point A be conserved after it passes point C? yes or no.
The two blocks A and B have weights WA= 79 lb and WB = 12 lb.(Figure 1) If the kinetic coefficient of friction between the incline and block A is μk = 0.2, determine the speed of A after it moves 3 ft down the plane starting from rest. Neglect the mass of the cord and pulleys. Express your answer to three significant figures and include the appropriate units. View Available Hint(s)for Part A Hint 1for Part A. How to approach the problem Use the principle of work and energy for the system of two blocks, which states that the system's initial kinetic energy plus the work done by all the forces acting on the two blocks as they move from their initial to their final position is equal to the system's final kinetic energy. Each block moves with its own speed, and to solve this problem, you need to find the relationship between these speeds. Hint 2for Part A. The relationship between the speeds of the blocks Write the equation that relates the blocks’ displacements,…
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It takes 34 s for the 60-Mg tugboat to increase its speed uniformly to 25 km/h, starting from rest. The propeller provides the propulsion force F which gives the tugboat forward motion, whereas the barge moves freely. The barge has a mass of 84 Mg . (A) Determine the force of the rope on the tugboat. Express your answer to three significant figures and include the appropriate units. (B) Also, determine F acting on the tugboat. Express your answer to three significant figures and include the appropriate units.
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The van is traveling at 20 km/h when the coupling of the trailer at A fails. If the trailer has a mass of 250 kg and coasts 45 m before coming to rest, determine the constant horizontal force F created by rolling friction which causes the trailer to stop. Note: 3 decimal points in every answer.
The force F, acting in a constant direction on the 22-kg block, has a magnitude that varies with the position s of the block. When s = 0 the block is moving to the right at v = 6 m/s. The coefficient of kinetic friction between the block and surface is μk= 0.3. Determine how far the block must slide before its velocity becomes 15 m/sm/s. Express your answer to three significant figures and include the appropriate units. Hint 1for Part A. How to approach the problem Use the principle of work and energy for the particle, which states that the particle's initial kinetic energy plus the work done by all the forces acting on the particle as it moves from its initial to its final position is equal to the particle's final kinetic energy. Note that besides force FF shown in the figure, the friction force acts on the block during its motion. Hint 2for Part A. How to find the friction force The friction force is directly related to the normal reaction, which in turn equals…
The force F, acting in a constant direction on the 22-kg block, has a magnitude that varies with the position s of the block. When s = 0 the block is moving to the right at v = 6 m/s. The coefficient of kinetic friction between the block and surface is μk= 0.3. Determine how far the block must slide before its velocity becomes 15 m/sm/s. Express your answer to three significant figures and include the appropriate units. Hint 1for Part A. How to approach the problem Use the principle of work and energy for the particle, which states that the particle's initial kinetic energy plus the work done by all the forces acting on the particle as it moves from its initial to its final position is equal to the particle's final kinetic energy. Note that besides force FF shown in the figure, the friction force acts on the block during its motion. Hint 2for Part A. How to find the friction force The friction force is directly related to the normal reaction, which in turn equals…