Two masses Definition and 241 Threads

This problem was on my test today and I am not sure if my solution is correct. Homework Statement A box of mass 2 kg and another of mass 8 kg are attached by a spring with a spring constant of 80 N/m. A 4.0 N force is applied to the 8 kg box. Both of the boxes move with a constant...

Homework Statement I have a system of two masses m hanged with lines l from the ceiling. We put a spring between the two masses. Find a general solution for this pendulum for small anglesHomework Equations The Attempt at a Solution Hmmm.. ##\sum M=0## ##J\ddot{\varphi _1}+mglsin\varphi...

Homework Statement Mass 1 weighs 10kg and has a velocity of 5m/s [E], Mass 2 weighs 5 kg and has a velocity of 8m/s[W]. Additionally, mass 2 has a spring attached to it with k = 2000N/m. The two masses collide head-on in a perfectly elastic collision. What is the compression of the spring and...

Homework Statement A 1.00-kg aluminum block and a 4.00-kg copper block are connected by a light string over a frictionless pulley. The two blocks are allowed to move on a fixed steel block wedge (of angle 31.0°). The aluminum block is on the left side, on a flat plane. On the right is the...

Homework Statement Consider a system of two masses joined by a massless string with the string passing over a massless frictionless pulley with a radius of 5.0 cm. The mass of the left is 9.00 kg and the mass on the right is 1.60 kg. Find the angular acceleration of the pulley when the...

http://i.minus.com/i7YDkagp0bChQ.png Homework Equations p = mv (v1m1 + v2m2) Vf = -------------------- (m1+m2) The Attempt at a Solution I got that the total momentum was 9.64 by using p=mv for summing m1, v1 and m2, v2. Then I used inverse trig to try...

Hi there, I'm new to the forum, but hopefully this question has a simply answer. my question is, suppose you have a mass (a) on the end of a string or rod attached to a vertical support which is grounded. The mass is rotating about that support. Now assume you have another mass (b) traveling...

Homework Statement I need to find the tension T, γ and β in part 2 of this question. The question is attached. Homework Equations First of all, the frame is a right angle triangle because (3L)^2 + (4L)^2 = (5L)^2 take torque about the point O we got 2LF + mg(4Lcosγ) = Mg(3Lsinγ) from...

Homework Statement If there is a mass on a frictionless table connected by a string to another mass hanging from a pulley off the side of the table, is the net force on the string zero? Is the force of tension equal on both sides if the system is accelerating? Would both objects accelerate...

what are the forces acting between two masses?can anyone explain how magnetic field is generated and what are the differences between magnetic and electric field?

I think it belong to Introductory Physics homehork, it's my first course college's physics course, I think it's pretty basic. We have particle 1 with a mass of 1.6 KG (left one), and particle 2 with an attached spring to it's left with a mass of 2.1 KG (right one). They're both in a...

I have been studying momentum and began believing that I understood it, but I began thinking... Between two objects of the same mass, the first object will collide with another object (let's say the second object is not moving) and the momentum, in an isolated system, will be transferred...

Homework Statement Homework Equations The Attempt at a Solution I've done part (a) and (b) using conservation of momentum and energy..for part (c) I'm not sure how to find the minimum angle ∅. I have also worked out the velocities of m1 and m2 just before the collision as...

Supposing we have two objects of masses m1 and m2 repeated by a large distance and sufficiently distant from any other masses or gravitational fields. The masses are not moving relative to each other initially. The masses will eventually move together by their mutual gravitational...

Homework Statement Hi guys. http://img189.imageshack.us/img189/5123/systemn.jpg The image shows the situation. A pointlike particle of mass m is free to move without friction along a horizontal line. It is connected to a spring of constant k, which is connected to the origin O. A...

Two masses m1=3.2 kg and m2=4.7 kg are connected by a thin string running over a massless pulley. One of the masses hangs from the string , the other mass slides on a 35 degree ramp with a coefficient of kinetic friction uk= 0.30. What is the acceleration of the masses? I used...

Homework Statement Consider a 2-D elastic collision between two masses. The first mass is moving at initial speed v0 towards the second mass. The second mass is initially at rest. Mass m1 = 0.1 kg and mass m2 = 0.2 kg. The first mass recoils at 30° above the horizontal at speed v1, and the...

Homework Statement Two masses m1 and m2 are connected to a spring of elastic constant k and are free to move without friction along a linear rail. Find the frequency of oscillatory motion of this system. Homework Equations m1a1 = -m2a2 The Attempt at a Solution There is equal and...

Homework Statement Two masses are connected by spring and slide freely without friction along horizontal track. What is period of oscillation?Homework Equations The Attempt at a Solution My solution: let x1 be position of mass 1 (m1) and x2 be position of mass 2 (m2) and L be length of...

Homework Statement A system consists of two blocks each of mass M, connected by a spring of force constant k. The system is initially shoved against a wall so that the spring is compressed a distance D from its original uncompressed length. Floor is frictionless. The system is now released...

Help with Kinetic Energy concept of two masses that move the same distance! I don't understand why the answer to this is B :( Because KE = (1/2)mv2, if they move the same distance and have DIFFERENT masses, the kinetic energies would be different no?

A moon is orbiting around the planet with a constant distance of 4.0 x 10^8 with... Homework Statement Question/w formulas are in attachment. I know I've been given two masses, 5.5 and 7.35 x 10^ 22 kg, and a distance of 4.0 x 10^8. But what I don't understand is the speed of 950 m/s and...

1a. Homework Statement Hi all, I'm having quite a bit of problem on a physics question. I've seen some examples of this problem, but when I follow the suggestions and equations out, the answer I get back is wrong... Anyways, here's the problem: Given two masses (m_1,~m_2) hanging from...

Homework Statement Two objects, m1 and m2, both of mass m, are place on a horizontal platform which is rotating at a constant angular velocity. m1 is located at a distance R from the axis of rotation and m2 is located at a R. The centripetal acceleration of mass m1 ____ to the centripetal...

Homework Statement The figure below shows an object of mass m1 = 1.1 kg on an inclined surface. The angle of the inclined surface is θ = 31° with the horizontal. The object m1 is connected to a second object of mass m2 = 6.10 kg on a horizontal surface below an overhang that is formed by the...

Homework Statement Two blocks connected by a cord passing over a small fictionless pulley rest on an double inclined plane (ie a traingle) with static friction coefficient of 0.5 and a kinetic friction coefficient of 0.4. The mass of block A is 100 kg (sitting at 30 degrees), while the mass of...

Homework Statement A block of mass1 5.0 kg is on a table that bonds a coefficient of friction of 3.00. Mass1 is attached to Mass2 by a string, and Mass2 is hanging over the table. The system is released from rest for it to accelerate. Homework Equations F=ma F fric = μFnormal The...

Hey Guys, I'm stuck with two particular problems that relates to two masses attached by a rope on a slope with unequal angles and I'm unsure how to go about the problem, I have never accounted a problem such as these before and I'm stuck with how to go about it. I have taken two photos of the...

Homework Statement In the Atwood's machine below the string passes over a fixed cylinder of mass mc. The cylinder does not rotate. Instead, the string slides on its frictionless surface. (Use any variable or symbol stated above along with the following as necessary: m1, m2, and g. Find the...

First of all, my question isn't completely unrelated to a homework question. I know how to answer that question using definitions in the book and mechanically get to the end. But I wanted to start from basic principles and arrive at the same answer. This lead to a contradiction which sent me on...

Homework Statement Two identical carts (of mass m) are free to move on a frictionless, straight horizontal track. The masses are connected by a spring of constant k and un-stretched length l_{0}. Initially the masses are a distance l_{0} apart with the mass on the left having a speed v_{0} to...

Homework Statement Block of mass mA = 2kg - lying on frictionless inclined plane with a slope of 20 degrees. connected to mA via frictionless, massless pulley and massless cord... mB = 3kg http://img152.imageshack.us/img152/8286/imag0103l.jpg Homework Equations F= Mass *...

I am wondering, how does lagrangian of such system look like? Will it be: L=\frac{m_{1} \cdot \dot{y}^2}{2} + \frac{m_{2} \cdot \dot{x}^2}{2} +\frac{m_{3} \cdot (\dot{y'}^2+\dot{x'}^2)}{2} + \frac{I \cdot \dot{ \alpha }^2}{2} - mgy - mgy' where: y'=\frac{l}{2}sin(\alpha)...

Homework Statement http://imgur.com/Y1Dua r = 0.2m I = 1.4kg m^2 m1 = 2kg m2 = 5kg h = 4m Homework Equations Δ(Gravitational potential energy) = m1*g*h - m2*g*h Δ(Kinetic energy) = (1/2)*m1*v^2 + (1/2)*m2*v^2 + (1/2)*I*(v^2/r^2) The Attempt at a Solution System is...

Homework Statement Two masses, m1 = 1.65kg and m2 = 3.30kg, attached by a massless rod parallel to the inclined plane on which they both slide, travel along the plane with m1 trailing m2. The angle of incline is 30°. The coefficient of kinetic friction between m1 and the incline is μ1 = 0.226...

So I've been prepping for my Engineering Physics 1 final, and I've been having trouble with rotational motion problems, but this problem has been driving me crazy for the past two days: Homework Statement (I wanted to include a normal link to an image, but I'm a new member, so here's...

Homework Statement Two masses ##m_1=2kg##, ##m_2=2m_1## are placed on the opposite edges of a spring of constant ##k_1=3N/m##, compressed of a length ##x_1=1.73cm##. The system is located on a smooth plane. At the right end of the plane there is a second spring of constant ##k_2=12N/m##. Once...

Q: Two masses m are connected by identical springs of constants k and they lie on a perfectly smooth surface. The extremity of one spring is fixed on the wall, the other one is loose. Find the equations for the motion of the system. Find the frequencies of oscillations. 1. Relevant equations...

Homework Statement Three small children of mass, 20kg (first child),24kg(middle child) and 16kg (third child), respectively, hold hands and are pulled across a smooth frozen pond (which will occur sooner rather than later) by a larger boy on skates. He pulls thm via horizontal rope being held...

Homework Statement A red box and a blue box sit on a horizontal, frictionless surface. When horizontal force F is applied to the red box, its acceleration has magnitude a = 5.09 m/s2. a) If force F is applied to the blue box, its acceleration has magnitude a = 1.24 m/s2. Find mred/mblue...

Homework Statement two masses m1=5 kg and m2=9 kg are connected by a string which passes over a massless frictionless pulley. the masses are moving with an acceleration a as shown. the coefficient of kinetic friction between m1 and surface of the table is 0.1 calculate the acceleration of...

Homework Statement In this exercise we used steel and glass balls to calculate and prove the conservation of momentum in elastic collisions. I had to prove how momentum is conserved through displacements vectors and right triangles. All that stuff is easy and I got it. The last question is...

Homework Statement A pulley with mass Mp and a radius Rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot. Mass M2 is larger than mass m1. The quantities Tn and g are magnitudes. (image attached) Select T-True, F-False, G-Greater than...

Homework Statement Two masses, M and 4M, are on opposite ends of a massless spring, sitting on a frictionless, horizontal table. The spring is compressed, and the spring-and-masses system is released from rest. If mass M oscillates with amplitude A and frequency f, then mass 4M will oscillate...

Homework Statement Two masses, M and 4M, are on opposite ends of a massless spring, sitting on a frictionless, horizontal table. The spring is compressed, and the spring-and-masses system is released from rest. If mass M oscillates with amplitude A and frequency f, then mass 4M will oscillate...

Homework Statement Two equal masses are glued to a massless hoop of radius R that is free to rotate about its center in a vertical plane. The angle between the masses is 2*theta. Find the frequency of small oscillations.Homework Equations \frac{d}{dt} \frac{∂L}{∂\dot{q}}=\frac{∂L}{∂q} The...

Homework Statement Two blocks both of mass m are placed on an inclined plane making an angle \theta with the ground. The two masses are connected with a spring of spring constant k. The coefficient of kinetic friction is \mu _k for both blocks. Assume that the spring is initially stretched...

Two masses connected by a string uniform circular motion. HELP! :) Homework Statement A puck of mass m1 is tied to a string and allowed to revolve in a circle of radius R on a frictionless, horizontal table. The other end of the string passes through a small hole in the center of the table...

Homework Statement Question statement: An object of mass m1 = 9.00 kg is in equilibrium while connected to a light spring of constant s = 100 N/m that is fastened to a wall as shown in (figure a): A second object, m2 = 7.00 kg, is slowly pushed up against m1, compressing the spring by the...

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...