Blocks Definition and 767 Threads

Homework Statement Blocks A and B are connected by a cable that passes over support C. Friction between the blocks and the inclined surfaces may be neglected. Knowing that motion of block B up the incline is impending when mB = 4.5 kg, determine: (a) the coefficient of static friction...

Homework Statement Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force. The masses of the three blocks are 15.1kg , 19.8kg , and 36.0kg , Answer the following questions concerning the motion of the blocks. 1. If...

[b]1. Two masses of m1 and m2 is connected by a massless undeformed spring rest on a horizontal plane.Find the minimum constant force Fmin that has to be applied on m2 so that other block get shifted if D is the coefficient of friction between blocks and surface [b]2. Homework Equations...

Homework Statement Block B of mass 10 kg is initially at rest as shown on the upper surface of a 20-kg wedge A which is supported by a horizontal surface. A 2-kg block C is connected to block B by a cord which passes over a pulley of negligible mass. Using computational software and denoting...

Hey! I found this interesting theorem in a textbook, but I was unable to find a proof for it neither in the web nor on my own Homework Statement The rank of a block triangular matrix is at least and can be greater than the triangular blocks. proof? specificaly, look here: pp. 25...

Homework Statement (see attachment) Homework Equations The Attempt at a Solution Case a) i)F=160N F is enough to overcome the static friction acting on block ##m_1##. Hence during motion kinetic friction acts and due to Newton's third law, an opposite and equal force acts on...

Homework Statement (see attachment) Homework Equations The Attempt at a Solution Consider the system at time t (see attachment, I am representing the blocks as point masses) The component of acceleration along the string is ##a_0\cos \theta##. This is the acceleration of the...

1. Two blocks made of different materials connected together by a thin cord, slide down a plane ramp inclined at an angle θ to the horizontal. The masses of the blocks are mA and mB and the coefficients of friction are μA and μB. PART A If μA < μB, determine a formula for the acceleration of...

Dear Forum Users, I am studying physics on my own, i am new to this forum, i am working every example in the book and i have a question. I hope that you are so kind to give me an explanation so that i can continue my chapter exercises. The question of the book is : What horizontal force must...

http://img824.imageshack.us/img824/5831/friction.jpg The coefficient of friction between surfaces and masses are shown in figure. Here the block M3 is pulled by the force F and for a particular F friction between m2 is twice as that of m1. So what is F? I'm keep getting half the value of...

Hello, i am trying to solve the following problem, but with no success. I need to find a way to split a matrix with dimensions N x M into an arbitrary number of blocks P. Not all blocks need to have the same size, say if we have a 16 x 25 matrix and want to split it into 8 blocks, we could...

What is the force of contact between the two blocks? Two blocks are in contact on a horizontal table. A force is applied on one of the blocks at a 30 degree angle (from the horizontal). The system moves towards the right. M1 = 2,00 kg and m2 = 1,00 km and F=60N and the kinetic friction between...

Force, tension and blocks plx help! Two blocks of identical mass are attached to the ceiling by a rope as shown in the figure. It is given that the middle horizontal rope has a tension of 30N. Find the masses of the blocks.

1. Two blocks, of masses M = 3 kg and m = 2 kg, are in contact on a horizontal table. A constant horizontal force of magnitude F = 5 N is applied to block M as shown. There is a constant frictional force of magnitude f = 1 N between the table and the block m, but no frictional force between the...

1. Homework Statement Two blocks (m1=4.0kg, m2=7.5kg) are attached by a light cord pulled along a horizontal surface by a force of 53N as shown in the diagram. If the coefficient of friction between the blocks and the surface is 0.30, what is the tension in the rope between the two blocks...

Homework Statement The sliders A and B are connected by a light rigid bar of length l = 0.50 m and move with negligible friction in the slots, both of which lie in a horizontal plane. For the position where xA = 0.4 m, the velocity of A is vA = 0.80 m/s to the right. Determine the acceleration...

Homework Statement Five blocks are connected together, each with mass m. Two of the five blocks are on an incline of angle θ. What is the acceleration of the last block that is not on the incline. See attached diagram for further details. Homework Equations F = ma F(grav) = mg sin(θ)...

Homework Statement See: http://www.aapt.org/physicsteam/2010/upload/2010_FmaSolutions.pdf #10 EDIT: There are several constants.Homework Equations F = ma Ff = μNThe Attempt at a Solution First: Draw a free-body diagram for block 2 (the bottom block) Up: Normal force from floor pushing on block...

Three blocks, each of mass 7.0 kg are on a frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction as shown at a rate of a = 1.1 m/s2. What is the net horizontal force on block B? =15.4 N What is the horizontal...

Homework Statement What force must be applied in the car of the image in order to all blocks remain stationary in relation to the car? Supposed that there's no friction in all surfaces, pulleys and wheels. Homework Equations Fr = ma The Attempt at a Solution First thing: That's a...

Hello, I was wondering if this problem is one that is solvable, and if so, if I would be able to solve it in a reasonable amount of time. Basically, say you have n blocks. You can arrange this blocks in stacks, so for example, if you had 3 blocks, you could make a stack of 2, and then add...

Homework Statement See attachment (1) what's forces act on pulley ? Find direction and magnitude Homework Equations F=ma The Attempt at a Solution After we find tension in robe , See attachment (2) what do we work ? Must decomposes tension to horizontal and vertical...

Hello, The problem is: Three blocks are connected by two ropes as shown. They are on a surface wit ha coefficient of friction of 0.25. The masses of the blocks are m_1=6~kg,m_2=9~kg,m_3=12~kg. Block 1 is pulled with a 93~N force horizontally as shown. Find the tension in each rope...

Homework Statement What is the tension of a string between 2 blocks of equal mass that are moving due to a pull of 17 Newtons?http://postimage.org/image/pmoibsy4p/ A. 8.5 B. 0 C. 17 D. 25 Homework Equations F=ma The Attempt at a Solution 17

Find the tension T of the two blocks. I think I'm doing something wrong :( T1 = m1g = (2)(9.81) = 19.62 T2final = T2 + T1 = m2g + m2g = (3)(9.81) + (2)(9.81) = 29.43 + 19.62 = 49.05 I did something wrong. :( Help?

Homework Statement Two blocks of mass m1 and m2 on a ramp with a frictionless surface? PLEASE HELP!? A diagram shows two blocks of mass m1 and m2 on a ramp with a frictionless surface. The blocks are connected by a massless string over a massless frictionless pulley. The ramp makes an angle...

Homework Statement Look at figure 4 Two blocks are attached to mass-less ropes and pulleys that have negligible mass and negligible friction. a. Find the connection between the tensions in the ropes. b. Find the connection between the accelerations of the blocks. c. Calculate...

Homework Statement The coefficient of static friction between two blocks is .60. The coefficient of kinetic friction between the lower block and the floor is .20. If a horizonatal force is applied to the upper block (m=4kg) what is the minimum amount of time the two blocks (m=7kg) can cover...

Greetings Fellow Physics lovers! I was wondering if somebody could please check my work on this problem. A 5 kg block traveling at 10 m/s collides into a stationary 2 kg block. Find the final velocities of the two blocks after the elastic collision. V1f=(m1-m2)/(m1+m2) (V1i)...

Homework Statement A block of mass 7.18 kg lies on a frictionless horizontal surface. The block is connected by a cord passing over a pulley to another block of mass 5.6 kg which hangs in the air, as shown. Assume the cord to be light (massless and weightless) and unstretchable and the pulley...

Hey guys I"m new to the forum so I just wanted to say what's up? You'll be seeing me a lot more often btw. :] Homework Statement Rachel is pulling 2 blocks across a horizontal friction less surface with an acceleration of 1.5m/s/s. The mass of Block 1 is 4kg and Block 2 is 2kg. 1) What is...

1-kg Block 1 sits on 10-kg Block 2. Friction between the blocks is 0.4 static, 0.3 kinetic while the floor is frictionless. A 4-N force is exerted on Block 1. What is the acceleration of Block 2? I know Block 1 won't move relative to Block 2 since it is canceled out by the frictional force...

A 6.0kg box is on a frictionless 35° slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.0kg weight. What is the tension in the string if the 6.0kg box is held in place, so that it cannot move? m1= 6.0kg m2= 2.0kg θ=35° So, for Box 1 to be...

Homework Statement A symmetric block of mass M1 with a groove of hemisphere shape of radius R rests on a smooth horizontal surface in contact with the wall as shown in the figure. A small block of mass m2 slides without friction from the initial position .Find the maximum velocity of the block...

Homework Statement A block of mass m1 = 4.0 kg slides along a frictionless table with a velocity of +10 m/s. Directly in front of it, and moving with a velocity of +3.0 m/s, is a block of mass m2 = 9.0 kg. A massless spring with spring constant k = 1120 N/m is attached to the second block as in...

It's the same diag. but the blocks are A and B and the angle is 30° Theta=30° Block A=15kg Block B=12kg assume the rope is massless us=.25=coefficient of static friction What is T? My Attempt at a solution I made FBD for both block A and B For A sum the forces...

Homework Statement Two blocks of masses m1 and m2, with m1 > m2, are placed in contact with each other on a frictionless, horizontal surface. A constant horizontal force is applies to m1. a) find the magnitude of the acceleration b) determine the magnitude of the contact force between the...

Homework Statement A block with a mass of 25 kg is hung midway between two pulleys, with a rope connecting a hook at the top of the block to each of the two pulleys. On the other side of the pulleys, both ropes are connected to blocks with masses of 15 kg. The 25 kg mass in the middle sags...

Problem text: Forces act on block A and block B, which are connected by a massless string. Force \vec{F}A=(12 N)\hat{i} acts on block A, with mass 4.0 kg. Force \vec{F}B=(24 N)\hat{i} acts on block B, with mass 6.0 kg. What is the tension in the string? The system looks something like this...

Homework Statement A block with mass m1 = 9.4 kg is on an incline with an angle θ = 31.0° with respect to the horizontal. Now a new block is attached to the first block. The new block is made of a different material and has a coefficient of static friction μ = 0.9. What minimum mass is...

Homework Statement Two blocks A and B ,each of same mass are attached by a thin inextensible string through an ideal pulley.Initially block B is held in position as shown in figure.Now the block B is released .Block A will slide to right and hit the pulley in time t1. Block B will swing and...

Homework Statement Two blocks are connected by a string that goes over an ideal pulley. Block A has a mass of 3.00 kg and can slide over a rough plane inclined at 30 degress to the horizontal. The coefficient of kinetic friction between block A and the plane is 0.400. block B has a mass of 2.77...

Homework Statement Blocks of mass and are connected by a massless string that passes over the pulley in the figure . The pulley turns on frictionless bearings, and mass slides on a horizontal, frictionless surface. Mass is released while the blocks are at rest. Homework Equations...

Homework Statement (Sorry if I used any wrong term, English isn't my first language) Be A (mass M) and B (mass m) two blocks connected to each other through an ideal wire passing through a wheel (caster), each block stays at one of the side of the wheel. If we apply a force F pointing up into...

Homework Statement Two blocks A and B with respective masses m_{A} and m_{B} with respective masses m_{A} and m_{B} are connected via a string. Block B is on a frictionless table, and block A is hanging at a vertical distance h from a spring with spring constant k that is at its equilibrium...

Hi, For example, say we have the binary integer 101010 and I split it into blocks, say (1)(01)(01)(0). The size of the blocks is determined by some function. We want to count the number of '1' bits inside each of these blocks. I'm interested in a fast C++ code to do this. There are fast...

Homework Statement The problem, verbatum from my textbook... Three identical blocks are pulled, as shown, on a horizontal frictionless surface. If tension in the rope held by the hand is 30N, what is the tension in the other ropes? The three blocks are tied together by string and a...

Homework Statement Two similar wooden blocks are tied one behind the other and pulled across a level surface. Friction is not negligible. The force required to pull them at constant speed is F. If one block is stacked upon the other then the new force required to pull them at constant speed...

Homework Statement A block of mass 2.0kg rests on top of another block of mass 10.0kg that itself rests on a frictionless table. The largest frictional force that can develop between the two blocks is 16N. Calculate the largest force with which the bottom block can be pulled so that both...

Good afternoon! 1. The Setup One block of Mass M2 is resting on top of a frictionless surface. Another block, M1, is resting on top of the of the first block. There does exist a coefficient between these two blocks, μ. 2. What happens to the bottom block when a force less than μN is...