Two blocks Definition and 242 Threads

Homework Statement a 30 kg is restin on a flat horizontal table. on top of this block rests a 15 kg block, to which a horizontal spring is attached, as shown in the drawing. the spring constant is 325N/m. the coefficient of kinetic friction between the lower block and the table is 0.600, and...

*****Homework Statement **** Two blocks, A and B, are sliding down an inclined (20 degrees) plane. Block A is sliding in front of block B with both of them touching. The blocks slide from a distance of 6.50m from the bottom (along the inclined plane, not the surface the plane rests on)...

Homework Statement I have 2 blocks. M1 is resting on a horizontal plane and attached to a string that goes over a pulley to M2. The plane is like an air hockey table to simulate very little friction. I attached spark tape to M1 so I could measure the time it took and distance traveled. Now...

Homework Statement Two blocks of mass m1 and m2, resting on a frictionless tabletop, are connected by a massless string passing through a frictionless pulley of mass mp. The figure shows a top view of the arrangement. If a force of magnitude F is applied to the pulley in the direction...

Homework Statement Two blocks are connected by a string as in the figure below. What is the upper block's acceleration if the coefficient of kinetic friction between the block and the table is 0.10? Express your answer to two significant figures and include the appropriate units...

Homework Statement The figure shows two 2.5 kg blocks connected by a rope that has a mass of 450g. The entire assembly is accelerated upwards at 7.4 m/s^ What is the tension at the bottom end of the rope, near block B What is the tension at the at the top end of the rope, near block A...

Homework Statement A 2.0 kg block slides along a frictionless surface at 1.0 m/s. A second block, sliding at a faster 4.0 m/s, collides with the first from behind and sticks to it. The final velocity of the combined blocks is 2.0 m/s. What is the mass of the second block? Homework...

Here's a (crude) drawing: http://i44.tinypic.com/2mg9ts2.png A block with mass 1.5kg is pushed against a spring such that the spring compression is 0.2m. The block is then released from rest and is observed to have a velocity of 10m/s once it is released by the spring. The block then collides...

Homework Statement A spring of negligible mass is compressed between two masses on a frictionless table with sloping ramps at each end. The masses are released simultaneously. The masses have the same volume, but the density of M1 is greater than that of M2. G-Greater than, L-Less than...

Homework Statement An 8kg block rests on an inclined plane where theta=37 degrees. The coefficient of kinetic friction on the plane is .23. The 8kg block is connect by a massless, frictionless pully to a hanging 16kg block. The blocks are released from rest. What is the acceleration...

Homework Statement On 20 degree incline, there are two blocks tied together with a rope, sliding down. the block on the top has mass of 2.0 kg (m1) and u_k1(coefficient of kinetic friction for block 1) = .30 the block on the bottom of the incline has mass of 3.0 kg (m2) and u_k2 = .20 What is...

Homework Statement Two blocks mA= 5.0 g and mB= 10.0kg are connected to a string. Both blocks sit on a smooth inclined surface where the angle on the inclined plane is 30.0°. Block A is about block B on the incline. Find the acceleration of the system of two blocks. What is the tension TB in...

I have a question for two scenarios (see the diagram attached): 1) When the two blocks on the table are at rest, the static friction the table exerts on the bottom block is counteracting the tension in the rope, resulting in a net force of zero. Is there any static force being exerted by the...

Homework Statement A 2kg block & 3kg block (left & right, respectively) are on a horizontal frictionless surface connected by a spring with K=140 N/m. A 15N force is applied to the 3kg block towards the right. How much does the spring stretch from its equilibrium length? Homework...

Homework Statement http://imgur.com/MaT4N Homework Equations Torque = Fr The Attempt at a Solution 1) I tried m2 g r - m1 g r = 1/2 M r^2 * (acceleration / r) didn't work 2)I tried replace the moment of inertia equation to above equation,still didn't work

Hello, I have worked out this physics problem. I then checked my answer, it was correct. However, I have a question about Part B which I will address once all of my information is given; Homework Statement A slab of mass m2 = 40kg, rests on a frictionless floor, and a block of mass m1 =...

Homework Statement In the figure, two blocks, of masses 2 kg and 3 kg, are connected by a light string which passes over a pulley of moment of inertia 4.00 E-3 kg m m and radius 0.05 m. The coefficient of friction for the table top is 0.30. The blocks are released from rest. Using energy...

Homework Statement A 3.0kg block sits on top of a 5.0kg block which is on a horizontal surface. The two blocks are connected by a string; the string connects the top to the bottom with a pulley. The 5.0kg block is pulled to the right with a force. The coefficient of static friction between all...

Homework Statement Two blocks sit directly next to one another on a frictionless surface. Block 1 has a mass of 1.0 kg and block 2 has a mass of 2.0 kg. A person pushes block 1 with a force of 10.0 N. a) Determine the acceleration of the system b) Determine the force that block 1 exerts...

Homework Statement Two blocks, as shown below, are connected by a string of negligible mass passing over a pulley of radius 0.225 m and moment of inertia I. The block on the frictionless incline is moving up with a constant acceleration of 1.97 m/s2 on an angle of 35.1 degrees. m1 = 15.4...

Homework Statement A student has two ramps, both of which are at an angle of 30o. Ramp 1 is frictionless and ramp 2 has friction. The student also has two blocks, one for each ramp. She pushes the blocks up the ramps with the same initial velocity. The block on ramp 2 only travels a...

Homework Statement Three blocks in contact with each other are pushed across a rough horizontal surface by a 75 N force as shown. The acceleration of gravity is 9.8 m/s2 . [PLAIN]http://img178.imageshack.us/img178/6198/007ow.png If the coefficient of kinetic friction between each of...

Homework Statement A force of 23.52 N pushes and pulls to blocks as shown in the figure below. The vertical contact surfaces between the two blocks are frictionless. The contact between the blocks and the horizontal surface has a coefficient of friction of 0.29. The acceleration of...

Homework Statement A block is hanging from a rope which has another rope connected to another block underneath. The top block has a mass of 60 Kg and the bottom block has a mass of 30 Kg. Both blocks are accelerated 1.2 m/s^2 upward. What is the tension force between the two blocks? (Assume...

Homework Statement A force of 32.68 N pushes and pulls to blocks as shown in the figure below. The vertical contact surfaces between the two blocks are frictionless. The contact between the blocks and the horizontal surface has a coefficient of friction of 0.24. The acceleration of gravity...

Homework Statement See attachment Homework Equations F=MA T=MA? The Attempt at a Solution M1: N1=M1gSin(32) T=M1gCos(32) Now does this work?: T=MA M1A=M1gCos(32) and that would give me the acceleration for the X-axis and i could do the same for the Y-axis and get the...

Homework Statement See attachment! Homework Equations Fk=UkN The Attempt at a Solution I can't find a way to start this problem can someone guide me please!

Homework Statement A block of mass 5.00kg rides on top of a second block of mass 10.0kg. A person attaches a string to the top block and pulls the system horizontally. Friction between the two blocks keeps the 5.00kg block from slipping off. If the coefficient of static friction is 0.350...

Homework Statement A block of mass m1 = 1 kg rests on a table with which it has a coefficient of friction µ = 0.77. A string attached to the block passes over a pulley to a block of mass m3 = 3 kg. The pulley is a uniform disk of mass m2 = 0.4 kg and radius 15 cm. As the mass m3 falls, the...

Homework Statement In terms of m_1, m_2, and g , find the acceleration of the first block in the figure . There is no friction anywhere in the system. http://session.masteringphysics.com/problemAsset/1038627/5/YF-05-71.jpg Homework Equations The Attempt at a Solution I know...

I'm a TA in an introductory course of (classical) mechanics at the university. I've been baffled for the couple two hours at this problem, taken from Resnick, Halliday & Krane (Fourth Edition in english; it's the 3rd ed. in spanish). I initially solved the problem, thinking my reasoning was...

Homework Statement Two blocks are on a frictionless track with a vertical, quarter circle, and 30 degree incline. Released from rest at point A, 1 kg smaller block 1 slides to B and makes an inelastic collision with 5 kg stationary larger block 2. The collision sents block 2 up the ramp. The...

Homework Statement Consider the setup shown below. The blocks have masses 8.2 kg and 25 kg. The pulley has mass 5.9 kg, and is a uniform disc with radius 0.25 m. Assume the pulley to be fric- tionless, but the coefficient of friction between the block and the surface is 0.28.What is the...

Homework Statement Two blocks are positioned according to the figure. Block A (80 lb) is attached to a rope as such that it doesn't slide or fall from block B (120lb). Compute the smallest value of Force to be applied on Block B for it to not move parallel to the inclined plane...

Homework Statement The coefficient of static friction between block A and a horizontal floor is 0.45 and the coefficient of static friction between block B and the floor is 0.30. The mass of each block is 2.0 kg and they are connected together by a cord. What is the tension in the cord...

Homework Statement Block A (mass 2.25 kg) rests on a tabletop. It is connected by a horizontal cord passing over a frictionless pulley to a hanging block B (mass 1.30 kg.) The coefficient of kinetic friction between block A and the table is 0.450. After the blocks are released from rest, find...

Hey, I'm just a tad confused about tension and how it works... Homework Statement Two blocks m1 (11 kg) and m2 (18 kg) are connected by strings, as shown in the below. String 2 breaks when T2 = 4.9033 N. Find T1 when string 2 breaks. Answer in units of N. (Blocks are on a flat surface, not...

Homework Statement Two blocks attached by a string (see figure) slide down a 20° incline. Block 1 has mass m1 = 0.65 kg and block 2 has mass m2 = 0.30 kg. In addition, the kinetic coefficients of friction between the blocks and the incline are 0.30 for block 1 and 0.20 for block 2. (a) Find...

Homework Statement A block of mass m1 = 280 g is at rest on a plane that makes an angle θ = 30° above the horizontal. The coefficient of kinetic friction between the block and the plane is μk = 0.10. The block is attached to a second block of mass m2 = 220 g that hangs freely by a string that...

2 really tricky ones for me on this homework assignment. I think I got the other one settled (Thanks to help here) -- now I just need to finish this last one. Homework Statement Two blocks sit on this frictionless table, but there is friction between the blocks. Static = .589 Kinetic =...

Homework Statement Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. the hanging block has a mass of 16 kg and the one on the plane has a mass of 8 kg. the coefficient...

Homework Statement A block of mass 4.0 kg is put on top of a block of mass M = 6.0 kg. To cause the top block to slip on the bottom one, while the bottom one is held fixed, a horizontal force of at least 19 N must be applied to the top block. The assembly of blocks is now placed on a...

Homework Statement Two blocks of mass m1=80 kg and m2=100 kg and attached by a string, another sting comes off of mass m1 and is pulled horizontally (kinda looks like this) (T1 & T2 are tensions) m2--T2--m1--T1--> there is a coefficient of friction u=.14 for both blocks, what is the tension...

Homework Statement A block with mass M rests on a frictionless surface and is connected to a horizontal spring of force constant k, the other end of which is attached to a wall. A second block with mass m rests on top of the first block. The coefficient of static friction between the blocks is...

Homework Statement A 2kg block sits on a 4kg block that is on a frictioness table. The coefficients of friction between the blocks are U(s)= .3, U(k)=.2 a. What is the max horizontal force that can be applied to the 4 kg block if the 2 g block is not to slip? Homework Equations Fr =...

Homework Statement A block of mass m1 = 3 kg rests on a table with which it has a coefficient of friction µ = 0.54. A string attached to the block passes over a pulley to a block of mass m3 = 5 kg. The pulley is a uniform disk of mass m2 = 0.4 kg and radius 15 cm. As the mass m3 falls, the...

Homework Statement a 3.4 kg block A and 6.0 kg block Bvec are connected by a string of negligable mass. Force FA = (12 N) acts on block A; force FB = (24 N) acts on block B. What is the tension in the string? http://img25.imageshack.us/img25/2610/imagepn.jpg Homework Equations F=ma...

Homework Statement Two blocks connected by a string are pulled across a rough horizontal surface by a force applied to one of the blocks. The acceleration of gravity is 9.8 m/s2 . 1st block = 2 kg 2nd block = 8 kg Force on second block at 52◦ μ = 0.29 [ 2kg ]-------[ 8kg ]/ 52 degrees If each...

Homework Statement Two blocks are pushed down on a spring with 75J of elastic potential energy. The spring is released and the blocks are allowed to fly freely (not sure I translated this sentence correctly, maybe separately instead of freely). Block A has a mass of 2 kg, block B has a mass...

Homework Statement Two blocks, of weights 3.6 N and 7.5 N, are connected by a massless string and slide down a 30° inclined plane. The coefficient of kinetic friction between the lighter block and the plane is 0.10; that between the heavier block and the plane is 0.20. Assuming that the...