Elastic Definition and 1000 Threads

Homework Statement a 6 kg, originally held at rest in position 1 as shown in the diagram below, slides down a frictionless quadrant of a verticle circle of radius 15 m. It then collides elastically with another 16 kg mass at rest at position 2. They bounce off each other and move on the...

elastic collision with Conservation of momentum problem? i need help with part b. Two titanium spheres approach each other head-on with the same speed and collide elastically, After the collision, one of the spheres, whose mass (m1) is .3 kg, remains at rest. (a) What is the mass of the other...

Homework Statement Homework Equations conservation of momentum, m1v1i+m2v2i=m1v1f+m2v2f and conservation of KE, ½m1v1i^2+½m2v2i^2=½m1v1f^2+½m2v2f^2 The Attempt at a Solution first, i defined my variables. v1i=-v2i, v1f=-0.750v1i, v1f=0.750v2i I tried isolating V2f using...

Homework Statement Two masses (m and 3m) are moving towards each other along the x-axis with the same initial speed (v). Mass m is traveling to the left while mass 3m is traveling to the right. They undergo elastic glancing collision such that mass m is moving downwards after the collision at...

I am studying the collision from the text, in which they said inelastic collision is the case when two collide objects stick together after collision. But in the class, the instructor said two objects stuck together is not the sufficient condition for inelastic collision, we should figure out if...

Hello, If a climber attached by rope happened to fall what would be the maximum elastic energy stored in the rope? I believe all the potential energy due to altitude would be converted into elastic in the rope (once the elastic energy is maximum and the kinetic energy equals zero), would it...

Homework Statement A billiard ball strikes an identical billiard ball initially at rest and is deflected 45 degrees from its original position. Show that if the collision is elastic, the other ball must move at 90 degrees to the first and with the same speed.Homework Equations Momentum: mv =...

A particle with speed v1 = 2.64 × 106 m/s makes a glancing elastic collision with another particle that is at rest. Both particles have the same mass. After the collision, the struck particle moves off at 45º to v1. The speed of the struck particle after the collision is approximately... The...

Homework Statement Determine whether velocity is conserved in elastic and inelastic collisions? Use your experimental data to support your results. Homework Equations I have my data charts which show that velocity is not conserved in inelastic collisions, but in elastic collisions some...

Homework Statement A proton strikes a stationary alpha particle (4He nucleus) head-on. Assuming the collision is completely elastic, what fraction of the proton’s kinetic energy is transferred to the alpha particle? Homework Equations Pi = Pf Ki = Kf The Attempt at a Solution For...

Homework Statement Walt and Wolfie collide in bumper cars of mass 50 kg each. Walt has a mass of 78 kg, and Wolfie has a mass of 61 kg. Walt strikes Wolfie from the rear at V = 3.7 m/s. If the collision is elastic, Wolfie is initially at rest, and Walt's final speed is 0.2655 m/s in the same...

I know this problem has been asked before but i am trying to understand. Homework Statement A 2.00-kg block is pushed against a spring with negligible mass and force constant k = 400 N/m, compressing it 0.220 m. When the block is released, it moves along a frictionless, horizontal surface and...

This is regarding youngs elastic modulus I need help as I am trying to figure out the stress and strain of an elastic band when a force has been applied - in youngs modulus. Does anyone know how to go about this?

WEIGHT (kg) Length (m) How much it extended (m) STRESS STRAIN 0.1 0.11 0.4 0.2 0.13 0.6 0.3 0.18 0.11 I did an experiment in physics for youngs modulus, I need to workout the stress and strain on an elastic band with weights attached, but I...

Same question as this link except my teacher changed the numbers. 1996-B No.1 part C http://lodischool.tripod.com/dovesol/DOVE96SOL.pdf Velocity of Bock A=4v0 2. mv+mv=mv+mv 3. I understand how to do the question in the pdf file. However, I don't understand how the concept...

Homework Statement A 2.0 kg ball is traveling east at 8.0 m/s when it has a perfectly elastic head-on collision with a 3.0 kg ball traveling west at 10.0 m/s. What are the final velocities of the two balls? Homework Equations http://www.nvcc.edu/home/tstantcheva/231files/G09_hw.pdf...

Homework Statement There are two carts, A and B, they hit each other and bounce off (Elastic) Here is what is given: vi=0 Mass of A=.8kg I call it Ma Mass of B=1.6 kg I call it Mb Vbo=1.0 m/s vib=0 vfb=.3 m/s Homework Equations conservation of Momentum I have p1 = p2 Ma...

Homework Statement A ball of mass 0.206 kg with a velocity of 1.54 m/s meets a ball of mass 0.291 kg with a velocity of -0.396 m/s in a head-on, elastic collision. (a) Find their velocities after the collision. 1f = m/s 2f = m/s (b) Find the velocity of their center of mass before and...

A cart with a mass of 340 g moving on a frictionless linear air track at an initial speed of 1.2 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision, the rst cart continues in the same direction at 0.66 m/s. (a) What is the mass of the second...

Homework Statement herman(m=135kg) is sitting motionless on a tire swing. eddie hits a baseball (m=2kg) and v=169 m/s. L=3.2m. (A)what is the velocity of the ball after the collision and (B) what is the velocity of herman after the collision. (C) what is herman's change in KE. (D) eddie hits...

Homework Statement 9.6 A table-tennis ball is thrown at a stationary bowling ball. The table-tennis ball makes a one-dimensional elastic collision and bounces back along the same line. Compared with the bowling ball after the collision, does the table-tennis ball have (a) a larger...

Homework Statement A ball with mass m = 0.230 kg and kinetic energy K1 = 1.16 J collides elastically with a second ball of thesame mass that is initially at rest. After the collision, the first ball moves away at an angle of θ1= 37.6° with respect to the horizontal. What is the kinetic energy...

help is urgently needed please and thank u. 1. When a 13.2-kg mass is placed on top of a vertical spring, the spring compresses 5.93 cm. Find the force constant of the spring. 2. If a spring has a spring constant of 400 N/m, how much work is required to compress the spring 25.0 cm from...

Would the 2 items displayed in the image below act as I expect in a zero G environment? Assuming that item A had a mass of 100kg and was stationary, Items B have a mass of 1kg and travel at 10m/s. what formula would I need to use to calculate the velocities and vectors of the items after...

1. http://i1269.photobucket.com/albums/jj597/bubakazouba/fd9bfcc2.png 2. m1u1+m2u2=m1v1+m2v2 3. I just don't get i know that in an elastic collision velocity of approach=velocity of separation it can be C or D why is the answer D?

I bought a cheaper set of roller blade wheels (you get what you pay for). With new wheels installed I had to work much harder to take longer on my usuall route. The new wheels had a hardness of 82a. The original wheels had a hardness of 80a and the last set had a hardness of 85a. The new wheels...

A rod (mass M, length L) hinged at point X. End Y is attached to X by an elastic string passing over a pin P, the natural length of the string is L. P is a distance L from X. Elastic Modulus of string: (1/4Mg) Refer to GPE to X and prove that total PE is: (1/4)MgL(1-cosθ-2sinθ) and find...

Homework Statement A pinball with mass 80g is struck by a lever with mass 80g in a pinball machine in an elastic collision. The lever was pulled back 2 cm by a spring with spring constant k=1.4N/cm. What is the speed of the ball just after collision? Homework Equations F=kx...

Homework Statement Jerry and Mary, a young penguin couple, got separated because of an arctic storm. The storm is over and they start looking for each other. Jerry sees Mary first and he starts running on his little legs towards her. Then Mary sees Jerry and starts running as fast as she can...

Someone told me I'd be more likely to get help here. Say you have these two balls moving in opposite directions. The balls float in the air and thus by themselves have negligible friction, but each is carrying a (detachable) bar across the ground, which has friction. On the very instant the...

Say you have these two balls moving in opposite directions. The balls float in the air and thus by themselves have negligible friction, but each is carrying a (detachable) bar across the ground, which has friction. On the very instant the balls collide with each other, they let go of their...

Homework Statement Take the case of elastic scattering (A+B -> A+B); if particle A carries energy EA', and scatters at an angle θ, in the CM (center of mass/momentum frame), what is its energy in the Breit* frame? Find the velocity of the Breit frame (magnitude and direction) relative to the...

HAllo everyone, I had a problem with the measurement of young modulus and shear modulus with ultrasonic measurements( pulse-echo overlap technique) For my metallic glasses rods (amorphous material) I used these formula for the calculation: 1. determination Shear modulus: G= ro * v...

I found the following: We have already seen that the flow of heat through conduction occurs when fast (hot) atoms collide with slow (cool) atoms, transferring some of their kinetic energy in the process. One might wonder why the fast atoms don't collide with the cool ones and subsequently speed...

When considering the case of two or more point masses colliding in a 2 dimensional plane, is there any way to determine the final state completely from the initial conditions? if not is it not a blow to the deterministic ways of classical physics...

Hi ! I am working on a table tennis playing robot. The picture of the robot is attached. I have few questions. 1) Can I consider the collision between Ball and the plate as the two dimensional collision ? ? (At this time I am not considering z-axis) 2) If I am considering the...

Hallo ! I am working on a problem. The data of the problem is: Two bodies are coming towards each other: Body 1: Mass = 3.5 Kg Body 2: Mass = 5 Kg The velocity of body-2 before hitting was 3m/sec and angle was 45 degree. The velocity of body-2 after hitting is 3.26197 m/sec and the...

Homework Statement A 45g marble collides with an identical stationary marble, and continues at 55 degrees to it's original direction. The collision is perfectly elastic. What is the angle between the direction taken by the target ball and the original direction of the incident ball...

Hi All, I'm familiar with the theory of how the soil can represented by means of FEM and how soil-structure interaction is being established. Most of books are pointing out at the Winkler -springs implemented mostly for beams and quadrilaterals (4 node) FEM elements. There are obviously...

I found this problem on a website. Is it right? (BTW, this is not homework, but I am just curious if I am thinking right about it.) A marble with a mass of 2 grams moves to the left with a velocity of 2 m/s when it collides with a 3 gram marble moving in the opposite direction with a velocity...

Homework Statement Hi Can anyone please help with this question? A light elastic string AB has natural length l and modulus of elasticity 2mg. Another light elastic string CD has natural length l and modulus of elasticity 4mg. The strings are joined at their ends B and C and the end A...

hi i am describing a noncentral elastic collision between two particles. therefore i assumed that one of them is at rest. now i want to return back to the system where both particles are moving. do i only need to add the velocity of the particle at rest to both of them and leave all angles...

Homework Statement I have mass of two points ma and mb than their vertical horizontal vector velocity parts before collision vxa0 vya0 vxb0 vyb0 and i need to calculate vector velocities after collision vxa1 vya1 vxb1 vyb1 I found something like the same vector componets of momemtums will...

https://dl.dropbox.com/u/73421703/b1.jpg hi there , I'm asking for help with this one! I should solve that problam through energy method. Given single force Q(not shown in the picture) on the edge of the cantilever(the right-end of the beam), what I'm looking for - The critical P(axial force)...

Homework Statement Consider an elastic string of length L whose ends are held fixed. The string is set in motion with no initial velocity from an initial position u(x, 0) = f (x). Assume that the parameter alpha = 1. Find the displacement u(x,t) for the given initial position f(x) The Attempt...

Homework Statement If it is eg. two balls, both going to the right before and after an elastic shock, how do you determine their velocities after the collision? (speeds before and weights are given) Eg. M = 50 kg u1 = 20 m / sm = 100 kg v1 = 10 m / s (M, m = mass) (u1, v1 = velocity before...

Homework Statement A mass of 10kg is attached to one end of an elastic string of unstretched length 1.5 m, the other end of the string being fixed to a beam located 2.5 m above ground level. The spring constant of the string is 600 Nm-1. If the mass is allowed to fall freely from the beam...

ok, this is the question: neutrons scatter elastically at 1.0MeV. after one scattering collision, determine what fraction of neutrons will have energy of less than 0.5 MeV if they scatter from: a. hydrogen b. Deuterium c. Carbon-12 d. Uranium-238 solution process... the basic...

Homework Statement A 35 kg child is jumping on a pogo stick. If the spring has a constant of 4945 N/m and it is compressed 25 cm, how high will the child bounce? Answer: 0.45 m Need help substituting the right variable. Homework Equations ETi= ETf Egi + Eki + Eei = Egf + Ekf + Eef...

I am attempting to determine a method for calculating the final pressure in a deformable bladder given a starting pressure and an applied load. Scenario: This is actual data gathered in my lab: A) You have a ball made from a rubbery material with P1=3psi. You weigh 150lbs and step on...