In the figure, three masses are attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table. mA = 5.4 kg, mg = 6.2 kg, and mc = 10.7 kg. Find the tension in the cord to the right (between masses B and C) once the blocks have been released and are free to move. Your answer should be in N: B

You are pushing a rubber crate against a concrete floor. The two surfaces have a static coefficient of friction of 0.61 and a kinetic coefficient of friction of 0.49. The floor is horizontal, and the crate has a mass of 25.0 kg, and is initially at rest. You are pushing with a horizontal force of 100 N. What is the magnitude of the force of friction in this case? Give your answer in units of N, to three significant figures.

A metal box having a mass of 100.0kg is pulled along a level plane, at uniform speed, by a horizontal rope applying a force of 325 N. An additional mass of 40.0 kg is now added to the box. What must be the force in the rope to move the box at uniform speed? If the rope will not transmit a force of more than 500.0 N, what is the greatest mass which can be added to the box?

A heavy sled is being pulled by two people, as shown in the figure. The coefficient of static friction between the sled and the ground is , = 0.579, and the kinetic friction coefficient is = 0.419. The combined mass of the sled and its load is m = 351 kg. The ropes are separated by an angle = 21.0. and they make an angle 0 = 30.1° with the horizontal, Assuming both ropes pull equally hard, what is the minimum rope tension required to get the sled moving? 1214.39 minimum rope tension: incorrect If this rope tension is maintained after the sled starts moving, what is the sled's acceleration? 1.56 acceleration: Attempt 1 N m/s?

I am not sure how to work on this problem, the answers are Na=29.8N, Nb=8.12N. They gave a hint which says to find the acceleration of the system first.

A horizontal force of magnitude F = 56.2 N pushes on a block of mass m = 5.87 kg. The block is on a frictionless incline that makes and angle θ = 33.9 degrees with horizontal.Write an expression for the acceleration ax of the block, taking up the ramp to be the positive x direction. Express your answer in terms of F, m, θ, and g (9.80 m/s2). What is the acceleration of the block in units of meters per seconds squared?

A mass M is at rest on a tilted tabletop, tied to a string which is tied to a second mass m that hangs off a pulley on the edge of the tabletop. The tabletop is tilted at an angle of ? = 15 degrees.  If the coefficient of static friction between M and the tabletop is ?s = 0.7, and M = 2.5kg, how large does m have to be to start the blocks moving? Please answer in kilograms.

The following information pertains to questions 1, 2, and 3. A workman pulls a sled across an asphalt road using a rope at angle 0 above the horizontal direction. The workman pulls with 1,000[N] of force. The coefficients of friction of the sled with the road are u=1.00 and µ=0.70. The sled has mass m. The sled is initially at rest. T710Q0[N]. 1) Which expression gives the magnitude of fmax for the situation illustrated above? A) mg B) mg – 1000cos(0) C) - mg + 1000cos(0) D) mg-1000sin(0) E) mg+ 1000sin(0) F) None of the above

Problem 9:   A horizontal force, F1 = 95 N, and a force, F2 = 19.7 N acting at an angle of θ to the horizontal, are applied to a block of mass m = 2.1 kg. The coefficient of kinetic friction between the block and the surface is μk = 0.2. The block is moving to the right. Part (a)  Solve numerically for the magnitude of the normal force, FN in Newtons, that acts on the block if θ = 30°.  Part (b)  Solve numerically for the magnitude of acceleration of the block, a in m/s2, if θ = 30°.

A block with mass m1 = 8.5 kg is on an incline with an angle θ = 33° with respect to the horizontal. The spring is replaced with a massless rope that pulls horizontally to prevent the block from moving. What is the tension in the rope?