Two masses Definition and 249 Threads

Homework Statement okay this is probably extremely basic stuff but I'm having a lot of trouble in this class and i hope someone can help! :/ A 10 kg mass is placed on a fricitonless surface and is attached to a 5 kg mass as shown by a light and inextensible string. ( here is a drawing of...

I am stuck with a problem. There are two point masses with values m1 and m2 respectively. Both are attached to the two ends of a spring with spring constant 'K'. Initially the spring has a elongation = X0, then it is released to follow its natural motion. We have to find the maximum distance...

Homework Statement Assume the three blocks (m1 = 1.0 kg, m2 = 2.0 kg, and m3 = 2.5 kg) portrayed in the figure below move on a frictionless surface and a force F = 48 N acts as shown on the 2.5-kg block. Click link for image: http://www.webassign.net/sercp9/4-p-029a-mi.gif (a)...

I just wanted to double check my logic on something! If two masses are held vertically by two strings like so: [ceiling] [string #1] [mass #1] [string #2] [mass #2] ...then what forces are acting on mass #1? My free body diagrams are below, could someone double check if they're correct...

Homework Statement Two masses are connected by a light string that goes over a light, frictionless pulley, as shown in the figure. The 8.7-kg mass m1 is released and falls through a vertical distance of h = 1.09 m before hitting the ground. Use conservation of mechanical energy to determine...

Homework Statement Mass m1 = 11.9 kg is on a horizontal surface. Mass m2 = 8.80 kg hangs freely on a rope which is attached to the first mass. The coefficient of static friction between m1 and the horizontal surface is μs = 0.526, while the coefficient of kinetic friction is μk = 0.168...

3.(a) A particle P, of mass 0.03kg, is attached to one end of a light inextensible string OP, of length 1 m. The other end of the string is attached to a fixed point O. The particle moves in a horizontal circle, with centre vertically below O, at an angular speed of 2 revolutions per second. The...

Homework Statement A mass m1 = 5.9 kg rests on a frictionless table. It is connected by a massless and frictionless pulley to a second mass m2 = 2.5 kg that hangs freely. Homework Equations 1)What is the magnitude of the acceleration of block 1? 2)What is the tension in the string...

[PLAIN]http://img221.imageshack.us/img221/541/slope.png Homework Statement two masses sliding down a slope[slope can't move] like in the attached picture. there is a static friction 'c' between the two masses. and between mass a and the slope there isn't any friction. so I am trying to...

Hi all, I'm having a problem with the following question. I have attached the question and my working for the solution however, I was told that the force summation solution which I have used and which many others have used is incorrect - an energy equation needs to be used. Basically we...

Homework Statement A mass m with initial velocity v0 collides head on with a mass 2m initially at rest. What is the final velocity of the smaller mass, as a ratio to v0? What is the final velocity of the larger mass, as a ratio to v0? Homework Equations Pi=Pf KE=.5mv^2 The...

Homework Statement If the left hand slope makes a 60 degree angle and the right hand slope makes a 20 degree angle. the left hand mass is 2.1 kg, and the right hand mass is unknown. what would the right hand mass be given a downward acceleration of .64 m/s^2. ? upslope at .76 m/s^2...

hello, Please see attached Ex and its Answer. I'm surprised that the pressure Txx has the same value as that in the instantaneous frame of the rotating rod Tx'x'. I believe this could be a typo isn't it ? Isn't the Lorentz transform the following matrix for the rotating rod around the z axis...

1. Two masses M1 and M2 are joined by a massless spring of force constant k and unstretched length a. Obtain the normal coordinates of the system for motion along the line joining the particles, as well as the normal frequencies of vibration.http://tinypic.com/view.php?pic=33voh6v&s=7 Here is...

1.The question Two point masses m_{1} and m_{2} are initially at rest. Distance between them is 'd'. How much time does it take for them to collide due to mutual gravitational attraction?2. Relavant Equations: F = \frac{Gm_{1}m_{2}}{r^2} \ \mu = \frac{m_{1}m_{2}}{m_{1}+m_{2}}Attempt at a...

Homework Statement A mass is hung from a spring which is secured to the ceiling. We measure the frequency of the oscillation of the mass. Now we attach a second identical mass to the other end of the spring and set the system on a frictionless surface. If we now compress the spring and release...

Homework Statement We are given the mass of the sun, ms = 1.99 x 10^30 and the mass of the venus, mv = 4.83 x 10^24. The distance from each other radius is r = 1.08 x 10^8. What is the centripetal acceleration? mv = 4.83 x 10^24 kg ms = 1.99 x 10^30 kg r = 1.08 x 10^8 km G= 6 67x10^-11 N m2...

Please refer to problem VI here: http://www.physics.ohio-state.edu/~dongping/phys131_winter2011/phys131/final-exam-practice-2011.pdf Use 10 for gravity if needed. Homework Statement 1. When the system is released from rest, what is the magnitude of the blocks' acceleration? 2...

Homework Statement Two boxes are connected by a weightless cord that runs through a frictionless pulley. Box B is hanging directly down from the pulley, while Box A is located on a ramp with a coefficient of kinetic friction at 0.15. The two boxes have the same mass of 2.7kg. What is the...

Homework Statement Two blocks of masses m1 and m2 are placed on a table in contact with each other. The coefficient for friction u1 between m1 and the table, and between m2 and the table is u2. A horizontal force of magnitude F is applied to m1. We wish to find P, the magnitude of the...

Hi fellows, 'Two particles of mass m are connected by three identical springs of relaxed length l and constrained to move longitudinally. What is the potential energy when the two masses are displaced from their equilibrium positions? What I know: let k = force constant of the strings, x1 and...

Homework Statement 2 particles are joined by mass less spring of length L. m2 initially resting on table and i am holding m1 vertically above m2 at height L. I project m1 vertically upwards with initial velocity Vo find position of the two masses at any time and describe motionHomework...

Hi, So I have a problem with a question upon reviewing a past physics final. Two boxes are connected by a massless, unstretchable rope that passes over a non-ideal pulley. The radius and mass of the pulley are R = 0.100m and M = 1.75 kg. As the pulley turns, friction at the axle exerts a...

Two masses hang from a meterstick whose fulcrum is at 50.0cm. M1=.100kg acts at 20.0 cm, what value of mass m2 at position 70.0 puts the the system at equilibrium? (.3m*(.1kg*9.8m/s2))=(.2m*(9.8m/s2*x kg)) .294 N*m=.2m(9.8*x N) 1.47 N=9.8*x N x=.15 kg Is this procedure correct...

Homework Statement Here is the problem with the picture Homework Equations F=ma The Attempt at a Solution I drew the free body diagrams for each block. Basically I am solving for FM1 on FM3 and FM3 on FM1 (I know that they are equal). I figured that the Net Force is 3N so i...

Homework Statement Two masses are in space. At a certain separation, the two masses have a force of gravitational attraction of 6.88 x 10 21N Determine the new force of attraction if the separation distance between the two masses is tripled, and mass of one object is reduced by half. Homework...

Homework Statement An Atwood machine is constructed using two wheels (with the masses concentrated at the rims). The left wheel (m1) has a mass of 2.1 kg and radius 21.44 cm. The right wheel (m2) has a mass of 2.8 kg and radius 33.94 cm. The hanging mass on the left (m3) is 1.53 kg and on...

Homework Statement Two identical blocks are connected by a spring. The combination is suspended, at rest, from a string attached to the ceiling, as shown in the figure above (THE FIGURE IS ATTACHED). The string breaks suddenly. Immediately after the string breaks, what is the downward...

Two "carts" and two masses on one ramp. Homework Statement http://web.ics.purdue.edu/~tkissel/hell.jpg Assume that both of the masses on the ramp are carts with equal masses. Assume no friction in this problem. There is no acceleration. Calculate the unknown mass (on the right side of the...

Homework Statement Two discs, each of mass m are connected by a stiff spring. Can you press the top disc down so far that when released it will spring back and lift the bottom disc off the table? Discuss the application of energy conservation to this problem. 2. The attempt at a solution...

Homework Statement A first block with mass M_1 is initially moving with a speed V_o to the right and a second block with mass M_2 is at rest. The second block has a spring attached to it. The spring has negligible mass. The spring has a spring constant k. The horizontal surface is...

Homework Statement Had to translate the original problem statement in order to post it here; sorry about the grammar. Block 1 has a mass m1=2.00kg, moving to the right (along the x-axis) with an initial velocity vi1=10.0 m/s. Block 2 has a mass m2=5.00kg and is moving in the same direction...

1. A small car of mass 708 kg is parked behind a small truck of mass 1797 kg on a level road. The brakes of both the car and the truck are off so that they are free to roll with negligible friction. A 81 kg woman sitting on the tailgate of the truck shoves the car away by exerting a...

Homework Statement [PLAIN]https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/phys2111/fall/homework/Ch-08-GPE-ME/twomasses_vertical_spring/3.gif A block of mass 7 kg hangs on a spring. When a second block with an identical mass of 7 kg is tied to the first, the...

Homework Statement Homework Equations m1 \SigmaFy=N-m1g = 0 \SigmaFx=T=m1a (Because there's no friction i see no opposing force to T) m2 \SigmaFy=m2g-T=m2a \SigmaFx=0 The Attempt at a Solution m2g-T=m2a T=m1a (m1+m2)a=m2g-T+T I notice that the T's...

Hello, The question I have is in regards to this page http://www.myphysicslab.com/molecule2.html where setting the gravity to zero and setting the mass of the red ball to 30 causes the system to move to the right slowly. You can reset the system after setting up the two variables so that no...

Homework Statement Find the acceleration of the block on the left in terms of M, m and g. See attachment Homework Equations F=ma The Attempt at a Solution From the free body diagram, -Mg+Mg+mg=(m+M)*a a=m*g/(m+M) I think this is correct, however the solution states the...

Homework Statement Two blocks, of masses M = 1.7 kg and 2M are connected to a spring of spring constant k = 180 N/m that has one end fixed, as shown in the figure below. The horizontal surface and the pulley are frictionless, and the pulley has negligible mass. The blocks are released from...

Homework Statement A circular disk has two masses acting on it, m1=10g, m2=50g. The forces caused by these masses are 4.5cm (F1) and 6.8cm (F2) away from the axis of rotation (center). The angles are 130 degrees (F1, and on outer side away from center) and 98 degrees (F2, also on outer edge...

Homework Statement A light, rigid rod l = 9.44 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.1 kg and m2 = 2.5 kg are connected to its ends. Determine the angular momentum of the system about the origin at the instant the...

Homework Statement An Atwood machine consists of two masses (16.4 kg and a 2.9 kg) strung over a 0.43 m diameter pulley whose moment of inertia is 0.031 kg·m2. If there is a constant friction torque of 0.18 N·m at the bearing, compute the magnitude of the acceleration of the two masses...

What happens when two masses touch? I mean, really touch. When I touch something, I know that the atoms in my hand are separated by some distance from the object I am touching, due to mutual repulsion by the electromagnetic force. So, if two charge-less masses were to collide with each...

Homework Statement Derive the equation of motion for the following Mechanical System. You need to introduce an additional variable to represent position of the bottom mass. I drew a picture ;D http://www.mediafire.com/imageview.php?quickkey=mzkx0mimmwd&thumb=4 Homework Equations EOM...

Homework Statement P is a pulley with neglectable mass which is being affected by an external force F. Determine the accelerations of P, m and M. I've got a picture, but it goes something like this: There's a pulley and from it (on each side) there are two masses hanging. On the left...

17. Two masses are connected by a string and pulled along a frictionless surface by another string one is 5kg and the other is 10 kg to which a tension of 40.0 N is applied. The magnitude of the system’s acceleration is A. 8.0 m/s2 B. 20 m/s2 C. 13 m/s2 D. 2.7 m/s2 (For this question I...

Homework Statement Consider two point particles, each of mass m, connected by a taut string that passes through a small frictionless hole (idealized as a hole of zero radius) on a frictionless table. a) for motion in which the top mass remains on the table and the string remains taut...

Homework Statement An unknown mass, m1, hangs from a massless string and descends with an acceleration g/2. The other end is attached to a mass m2 which slides on a frictionless horizontal table. The string goes over a uniform cylinder of mass m2/2 and radius R. The cylinder rotates about...

Homework Statement Two objects are connected by a massless rope that passes over a massless, frictionless pulley. One of the objects has a fixed mass (m), while the other is a bucket filled with water (M) with initial mass of 45. kg. The objects are releases from the rest (shown below). There...

Homework Statement It was on my test yesterday. There is a 10kg block on an incline of 45degrees connected by a string to another block hanging over the side of the incline by a frictionless massless pulley. Kinetic friction on the block on the incline is mu=0.5 The block that is hanging...

Homework Statement Hi guys, got a bit of a tough problem that i can't seem to solve. What is the acceleration of two masses and the tension in the string if both surfaces are friction less. http://img376.imageshack.us/img376/5889/physics.jpg Homework Equations The...