Blocks Definition and 746 Threads

Three objects are connected on a table as shown in the http://www.cybertrails.com/~reedaz/pic1.JPG . The table has a coefficient of kinetic friction of 0.350. The objects have masses of 4.00 kg, 1.00 kg, and 2.00 kg. The pulleys are frictionless. Determine the acceleration of each object and...

Block1 has a mass of 8.63 kg and block2 has a mass of 1.24 kg. b1 is on an inclined plane with no friction. The plane is 30 degrees from the horizontal. b1 is connected to b2 with a string-pully system (no mass or friction). b2 is on a horizontal plane witha kinetic friction of .145 Block m1...

A block of mass m_1 is attached to a massless, ideal string. This string wraps around a massless pulley and then wraps around a second pulley that is attached to a block of mass m_2 that is free to slide on a frictionless table. The string is firmly anchored to a wall and the whole system is...

i need help with this problem The base of the pyramid is 100 blocks by 100 blocks; each successive layer is one less block wide and deep, until the top layer which is simply one block. Each block is 97 cm wide by 97 cm deep by 63 cm tall. If one liter of paint can coat exactly three square...

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 = 0.7 kg and radius 15 cm. As the mass m3 falls, the string does not slip on...

Two identical blocks are tied together with a string and placed along the same radius of a turntable that is spinning about its center. The inner block is 4 cm from the center and the outer block is 5 cm from the center. The coefficient of static friction between the turntable and the blocks is...

The problem is: two identical blocks tied together with a string which passes over a pulley at the crest of the inclined planes, one of which makes an angle q1 = 18° to the horizontal, the other makes the complementary angle q2 = 72°. If there is no friction anywhere, with what...

Four blocks are on a horizontal surface. https://www.physicsforums.com/attachment.php?attachmentid=4000&stc=1 randomlabel.png The blocks are connected by thin strings with tensions Tx, Ty, Tz. The masses of the blocks are A=44.0 kg, B=21.0 kg, C=24.0 kg, D=35.0 kg. Two forces, F1=75.0N...

Enjoy. http://www.puzzleworld.org/SlidingBlockPuzzles/quzzle.htm To start, try A1236 63266 A4578 ...

Which of the following are true ? (a) Proteins range from a MW from about 3,000 to 1.0e6 g/mol (b) Fibrous proteins are the main component of Muscle,hair and cartilage (c) Building blocks of proteins are the beta-amino acids (d) Polar amino acid side...

Four blocks of mass m = 10 kg are arranged as shown in the picture, on top of a frictionless table. A hand touching block 1 applies a force of F1h = 90 N to the right. The coefficient of friction between the blocks is sufficient to keep the blocks from moving with respect to each other. I...

I'm just starting to get my head around the concepts of Tension and Force but I'm stuck on this question, I was wondering if anyone could help me out? Q: 3 identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force F. The...

The figure shows two 1.0 kg blocks connected by a rope. A second rope hangs beneath the lower block. Both ropes have a mass of 250 g. The entire assembly is accelerated upward at 3.0 m/s^2 i found the force that pulls the system to be 32.0N However the followup question states: What is the...

Can anyone help me with this problem. I know that I need to find the total total forces for both blocks and combine them to solve for the acceleration and then use the acceleration to find the time. The problem is that I can't seem to get the correct value for the final answer. Thanks in advance...

A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N. What is the magnitude of the force of the car on the truck? What is the magnitude of the force of the truck on the...

This question bothered me for some time. From what i have seen in textbooks, dispersion occurs as soon as white light passes from air into a glass prism, but why not for a glass block, assuming that the angle of incidence is the same? The standard answer for why dispersion happens in glass...

I have a homework problem, that is giving me some trouble. I have to move two blocks that weigh (1.2kg), connected by a rope. They give static friction coefficients for each block. I know that I must overcome the static frictions to make them move. I think I need to add the coefficients and...

:cry: I need help with the following problem, I have tried a few different things, but none of them seem to be working: Two blocks are stacked on a table. The upper block has a mass of 8.2 kg and the lower block has a mass of 35 kg. The coefficient of kinetic friction between the lower...

appreciate if Sum1 can help Two Blocks and Two Pulleys(Other answer didn't include T?) A block of mass m_1 is attached to a massless, ideal string. This string wraps around a massless pulley and then wraps around a second pulley that is attached to a block of mass m_2 that is free to slide...

Now I am supposed to find the magnitude of the vertical acceleration of mass 1, in terms of mass 1, gravity and the tension. I found that a_1= ((m_1*g)-2T)/2m_1 but that isn't right. Any help would be great

Based on the fact that the string is massless, and the system and table are frictionless, how would I find the tension in the string acting on mass 2?

There is a spring on a ledge that is 15 m above the ground. It is compressed 0.5 m by a block of 3 kg, and its spring constant is 15 N/m. I'm not certain of the exact wording, but somehow the compressed string (with the block) is the horizontal length of the ledge. Now in this scenario, the...

I did this question several times and all I get for acceleration is negative 9.8... static friction for the top block is .60 and kinetic friction for the bottom block is .20... The force is making both blocks move a distance of 5 meters starting from rest. They want to know What is the least...

Two identical blocks tied together with a string which passes over a pulley at the crest of the inclined planes, one of which makes an angle q1 = 20° to the horizontal, the other makes the complementary angle q2 = 70°. If there is no friction anywhere, with what acceleration do the blocks move...

Figure 6-36: http://www.webassign.net/walker/06-36alt.gif 5. [Walker2 6.P.071.] Two blocks, stacked one on top of the other, slide on a frictionless, horizontal surface (Figure 6-36), where M = 5.0 kg. The surface between the two blocks is rough, however, with a coefficient of static...

Ok, I have this problem I've been working on forever, but can't figure out the last part of the question. A block of mass m1 = 2 kg and a block of mass m2 = 3 kg are tied together and are pulled from rest across the floor by a force of P = 30 N. The coefficient of friction of the blocks...

Two blocks, a one foot cubic block in sitting on top a four foot cubic block. Both blocks are moving forward at 36 fps and instantly begin to decelerate...the larger block with cof of .9 (-28.98 fps/sqr) and the top block with cof of .3 (-9.66 fps/sqr). Trying to determine the time/distance...

Hey guys, I have a physics problem that I tried to solve but I am not positive of the answer I got. Can someone guide me through the steps of solving it. Problem: Two blocks connected by a rope are dragged by a horizontal force (68 N [right]). The first block is 18Kg, the second block...

Q. Two blocks are sliding across a table pushed by a force F from the left equal to 23 N. The force of friction from the table on m1 is 4 N and the force of friction on m2 is 12 N. m1 = 2 kg and m2 = 6 kg. a) What is the magnitude acceleration of the entire system? I figured this part...

Ok, I don't know what I'm really doing in this problem. It does not seem as hard as I am making it seem, but I guess I need help to be guided through it. Here's the problem: Blocks of mass 4, 8, and 12 kg are lined up from left to right in that order on a frictionless surface so each block...

OK I was helping a friend with his physics HW but I can't remember for the life of me how to do this. A block of mass 4.0 kg is put on top of a block of mass M = 5.0 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 17 N...

OK, three blocks on a fricionless horizontal surface are in contact on each other, a force is applied to block 1, m1, m2, m3, respectively. And m1=m2=m3. how come the force of contact that block one exerts on block is F(m2+m3) / (m1+m2+m3) instead of just F*m2/(m1+m2+m3). ( I know that a is...

I have a box when suspended from a cable in a vacuum is 4450N and is .608m wide (it's also a cube). W = 4450N = T1 (tension on the cable) V = 0.2248m^3 When I suspend it into a liquid, L/2 m from the surface, of density 944 kg/m^3, I want to know the buoyant force, the new tension of the...

I've got a U-tube filled with Mercury and water. If I add 11.2 cm of water to the left side, how much does the mercury rise on the right side? For simplicity's sake, D will stand for density, p0 for initial pressure, w = water, m = mercury, h = 11.2 cm for the water and d = the distance the...

Hi everyone, I need to prove that any number with a repeating block of digits is a rational number. Someone told me I should first find a method of constructing a rational number in the form a/b from a number with repeating blocks of digits (and to do it with very 'easy' numbers first). I'm...

I'd like to make sure I understand it. It reads... "Two objects, A and B, are placed in contact with each other on a horizontal, frictionless surface. Object A weighs 1.5kg, and B weighs 2.5kg. If a force of 8.0N is exerted on the surface of object A in contact with B AND on the opposite...

In the attached figure, block A of mass 2.0kg slides on a horizontal frictionless table with velocity of 3.0m/s and collides with block B of mass 3.0kg initially at rest on the edge of the table. Block B moves with a horizontal velocity of 2.4m/s, just after the collision. (a) Use...

Can any of you help me in how to treat the cables in the arrangement pulleys and blocks attached ?. thanks, Leonel

Hi, for all ! could any of you help me to understand the velocities on cables linked to pulleys. Please, see the attached problem. thank for all of you, Leonel

A block M1 of mass 16.5 kg sits on top of a larger block M2 of mass 26.5 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.405. The kinetic friction coefficient between the lower block and the flat surface is 0.105. A horizontal force F =...

For the following problems, I don't know how to start . Please explain every step to me with emphasis on the difference in finding the blocks' acceleration accompanied by the coefficient of friction and the case if it was not present. [I have other problems I need to do.] Find each block's...

Five identical wood blocks of sides L and thickness H are shifted in one direction to form a leaning tower of the maximum protrusion. How should you stack the blocks to achieve the maximum protrusion? What is the maximum protrusion? What if you had an infinite number of blocks? For any...

http://www.myimgs.com/data/Cyto/Physics.jpg The ramp and the ledge which the box sits on is has a Mu(k) of 0... the spring compression of the block when released from rest is 98cm... i found the height of the ramp being 29m, and the speed at the top of the ramp being 11.8.. i just need help...

can someone give me the formula needed to do this problem? "a karate strike hits wooden blocks, the hand undergoes an acceleration of -6500 m/s2. Medical data indicates the mass of the forearm and hand to be about 0.8 kg. What is the force exerted on the hand by the blocks?" am i supposed...

You got to see the picture 1st. A block of mass m1 = 2 kg rests on a table with which it has a coefficient of friction µ = 0.66. A string attached to the block passes over a pulley to a block of mass m3 = 4 kg. The pulley is a uniform disk of mass m2 = 0.5 kg and radius 15 cm. As the mass m3...

Two blocks with masses of 4kg and 8kg are connected by a string and slide down a 30 degree inclined plane. The coefficient of kinetic friction between 4kg block and the plane is 0.2; that between 8kg block and the palne is 0.35. A) calculate the acceleration of each block. b) calculate teh...