Elastic Definition and 1000 Threads

Homework Statement A 1 Kg car moving at 2m/s collides elastically with a stationary car. The first car rebounds opposite to the original direction at 1m/s and the second car moves off in the original direction of the first car. A) What is the mass of the 2nd car B) What is the speed of...

Homework Statement A hockey player of mass 8.0x10 kg was skating at a velocity of 7.5 m/s [E] when he accidentally hit a linesman who was just standing on the ice. The mass of the linesma is 9.0x10 kg and his velocity after the collision was 3.0 m/s [N30°E]. a) find the velocity of the hockey...

Homework Statement A spring, having a force constant of 6.0x102 N/m, is held in a vertical position and compressed 0.30m. A 5.0 kg mass is then placed on top of the spring. THe mass is then releases. Neglecting air resistance and the mass of the spring, calculate: a) the velocity of the...

Homework Statement Two identical cars approach each other on a straight road. The red car has a velocity of 40MPH to the left and the green car has a velocity of 80MPH to the right. A spring is attached to the front bumper so that a head-on collision will be elastic. If the maximum indentation...

I am not sure which formula to apply, can anyone help me out? Homework Statement 28. A square copper bar experiences only elastic deformation if it is stressed less than 95MPa. To support a load of 1340kg without exceeding this stress, the minimum square cross-section ( i.e. width of one...

Homework Statement A 1.2 kg spring laboratory cart is held against a wall. The spring constant is 65.0 N/m. The spring is compressed 8.0 cm when held against the wall. What is the compression of the spring when the cart's velocity is 42.0 cm/s? Homework Equations (1/2)mv^2=(1/2)kx^2...

Homework Statement An object of 2kg moving at 3m/s hits a 4 kg stationary object, causing the stationary object to begin moving at 0.5m/s. How fast is the original object now travelling? It is an elastic collision. Homework Equations Not really sure, 1/2mv^2 I presume. The...

This is the equation I'm talking about: PV = nRT So say I had a bit of Ideal Gas in a completely insulated elastic balloon, and I raised a temperature just a little bit. PV = nR(2T) Because this is an elastic balloon, would the volume also double? P(2V) = nR(2T) But what if the...

Calculating maximum heright of Mass 1 after elastic collision? Homework Statement Here is the question: Two blocks are free to slide along the ramp. The bloack of m1 = 5.00kg is released from the position at the top of ramp at height h = 5.00m above the flat part of the track. Protruding...

Homework Statement A horizontal spring, of force constant 12N/m, is mounted at the edge of a lab bench to shoot marbles at targets on the floor 93.0 cm below. A marble of mass 8.3 x 10^-3kg is shot from the spring, which is initially compressed a distance of 4.0 cm. how far does the marble...

Homework Statement A 12kg wad of clay is hurled horizontally at a 100g wooden block initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides 7.50m before coming to rest. If the coefficient of friction between the bloack and the surface is .650...

Homework Statement Okay, we have a lab about elastic and inelastic collision, and we have to do it in an air table/spark table that generates dots (can be like ticker tapes). We have to determine Momentum (P and P') and Kinetic Energy (Ek and Ek') Please view my attachment. (' = after...

Hi, I'm doing some research on friction, and I did some tests with 4 different types of floor. Now the first of these four floors is a sport surface (it has a polyurethane top coat), the second one is a floor-tile (with fabric on top), the third one a piece of foam and the fourth a piece of...

Here are 3 problems I have been working on. Any help would be very much appreciated. Thank you in advance! Homework Statement Two inelastic balls are traveling toward each other with velocities -4m/s and 7 m/s and they experience an elastic head on collision a)obtain the velocities...

1. A bumper car with mass m1 = 105 kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 98 kg is moving to the left with a velocity of v2 = -3.8 m/s. The two cars have an elastic collision. Assume the surface is frictionless. 2.Vcm= (m1v1+m2v2)/m1+m2 V1 in...

Homework Statement Two balls with masses m1 and m2 moving on a horizontal table in the same direction but at different speeds collide elastically. Obtain expressions for the position and motion of the centre of mass in terms of the separate positions and motions of the two balls before...

hi experts Is collison of cars on road an inelastic collision? because friction force is present - please help me in this regard.

Hi Experts two cars collide on road - it cannot be elastic collision but will it be a inelastic? and does in real life we can have elastic and inelastic collision.

Question about momentum depending if the collision is elastic or not?? Homework Statement Im writing up a lab, and there is something I can seem to get. Does the change in momentum depend on whether the collision is elastic or not? I know it does, but HOW? For example collision of 2...

i need help with this problem. i have no idea how to do this. A 1.41 kg object is held 1.38 m above a relaxed, massless vertical spring with a force constant of 288 N/m. The object is dropped onto the spring. (a) How far does the object compress the spring? 1 m (b) Repeat part (a), but...

Elastic and Inelastic neutrons scattering..! How I can find the energy lost by the neutron in elastic scattering and inelastic scattering, if we assumed its isotropic scattering in the center of mass?

Elastic and Inelastic neutrons scattering..! How I can find the energy lost by the neutron in elastic scattering and inelastic scattering, if we assumed its isotropic scattering in the center of mass?

1. A pendulum bob of mass m is released from a height H above the lowest point. It collides at the lowest point with another pendulum of the same length but with a bob of mass 2m initially at rest. Find the heights to which the bobs rise given that the collision is (A) Completely Inelastic...

Problem: Consider the following scenario: An elastic band is used to suspend a metal cylinder vertically. The cylinder is given an initial downward motion so that it moves down, reaches a low point, and then moves back up again. Your challenge task is to determine the tension in the...

Seems that most of the textbooks are dealing with elastic beam calculations, where a beam is fixed from both ends and initially there is no axial stress or load applied. My problem is different in a way that an elastic rectangular beam is fixed from both ends and it is under certain tensile...

Homework Statement An elastic string with modulus of elasticity=12. Natural length= 0.5m. Mass of ball attached to the end of the string=0.5kg. The other end of the string is fixed at point P. The particle is pulled down until it is 1.5m below P. Find the kinetic energy of the particle...

A stationary object with mass mb is struck head-on by an object with mass ma that is moving initially at speed v0. If the collision is elastic, what percentage of the original energy does each object have after the collision? I don't know how to find percentage.

Hi, I came across this question which i couldn't figure out why the kinetic energy of the table-tennis ball is greater than the bowling ball after collision. Qn: A table-tennis ball is thrown at a stationary bowling ball. The table-tennis ball makes a one-dimensional elastic collision and...

Hi everyone. I would really appreciate if I could get some help with this problem elastic collision problem. I will provide the question and the solution as shown in my textbook. What I would like to know if specifically how they used the equation, V2ix-V1ix = -(V2fx-V1fx), and why they arranged...

Hey everyone, Reviewing material for a technical interview and I have stumbled into some problems that I sadly have issues with. Old review for me :D. Any help would be appreciated. I can follow up through the conservation of energy equation. However at the in an elastic collision...

In an inelastic collision, it is said that the total KE is not conserved but the total momentum is. When both the momentum and KE are the products of mass and some power of velocity, how total value of one remains constant and the other not. This is very confusing.

Homework Statement A charged particle with mass m = 200g and charge q = 25 µC is suspended from an elastic cord with force constant K = 5 N/m in a vertically upward electric field E of magnitude 3.7 x 10^5 N/C. What is extension of the cord when the particle is in equilibrium? Homework...

Homework Statement Prove that in an elastic collision between two identical bodies, one of which is initially at rest, the angle between their velocities after collision is pi/2, except for the case of central impact. Homework Equations Assume particle 1 travels in the x direction with...

Why does glass get elastic when immersed in HF; like this video? Hi, I was surfing YouTube and came across a very interesting video... Check it out yourself; http://youtu.be/gzUDjHDj0fQ" Why did the glass become elastic? I was thinking it might be due to destruction of some bonds...

Hi everyone. I believe that I'm in the right place for this topic. If not, please excuse me for the misplacement :) I am a programmer, not a physicist, so please excuse my lack of knowledge. I currently need help with an energy conservation problem. I am currently working on this problem...

Hello, I have problem with understanding the concept of energy of deformed body. As far as I know, Clapeyron's theorem states that elastic energy of deformed body is half the work done by external forces; this are surface and body forces which deform the body. Then, I wonder, where has...

Homework Statement There is a ball rolling on a frictionless horizontal surface of mass m and with velocity 5m/s. It collides elastically with a block mass 3m that is initially hanging at rest from a 50 cm wire that is hanging from the ceiling.Find the maximum angle through which the block...

Classical Mechanics Homework question Question - A light elastic string AB of natural length L and spring constant K, lies slack on a horisontal plane. A particle of mass m also at rest, is attached to end A of the string. The other end B is pulled along the plane with constant velocity V...

(This isn't homework help, but it's something that's been on my homework (and other places in my mechanics class)...I don't know if it belongs here or in the homework section. If I'm wrong, sorry -_-) I've had a few questions now in class about a two-dimensional elastic collision between two...

Homework Statement IV. The block in the figure has a mass of 0.150 kg, and the surface it is on is frictionless. The force constant of the upper spring is 250 N/m, and the force constant of the lower spring is 450 N/m. The upper spring is initially compressed by a distance of 0.10 meters. The...

Homework Statement if m1 and m2 (m1= m2, (vm1 = 4m/s)) collide at an angle λ (60°) we can fully predict oucome: angles (60° and 30°) and speeds (2 and 3.46) can we predict the outcome if we know that m1/m2 = 3/ 5 ?

Homework Statement Let two particles of collide in a perfectly elastic collision. Particle 1 has a mass of 2m, while particle 2 has a mass of m. Particle 1 has initial velocity v, directed to the right, while particle 2 is at rest. What are the final velocities, v1 and v2, of particle 1 and...

If I have an elastic formin a helix which I've turned N times and have a radiu r... it connect two masse m (one of them is fixed) - the natural length of the ropes are X_0 (the distance between the masses) what are the equation of motion X(t) and (Theta)(t) ??

Homework Statement A 0.045kg Steel marble collides obliquely with an identical stationary marble, and continues at 55 degrees to its original direction. The collision is perfectly elastic. What is the angle between the direction taken of the target (previously static) ball and the original...

Alrighty, I'm working on a three dimensional physics simulator that does every operation in spherical coordinates and vectors, and I'm stuck on figuring out elastic collisions. are elastic collisions essentially trading momentum between the two colliding bodies? I'm assuming not, but i can't...

Hi everyone! I'm new to this forum. I enjoy physics but I'm full of doubts :) Now I'm trying to understand how motion is transmited through collisions and I can't understand why elastic collisions keep kinetic energy constant and why constant of restitution equals one. I just imagine that the...

Homework Statement Thomas the train and Diesel are involved in an elastic collision. A 2.5 kg Thomas is, at rest but is approached head-on by a 5.0 kg Diesel moving at 0.60 m/s. The force-separation graph for the ensuing collision is given: http://tinypic.com/r/2zyftae/7 a. What is the...

Hi everybody. That's my first (of many) post here! I'm a brazilian guy who is trying o solve de Wopho's Problems. And onde of then called my attention for the criativity using an (theoterically) easy concept of elastic collision. The problem is the second...

Hi! This is probably something silly but here goes. My question involves elastic potential energy and work… So we know that a change in potential energy = Work done, as long as the forces are conservative... delta U = Work done Let’s say we have a spring… Work done/by on a spring is, W=...

I am puzzled with the energy conversion (actually I think I am easily get stuck with PE, KE and work done) when an elastic matter is being stretched or relaxed. First of all, regarding the elastic hysteresis of a rubber, in the Force-extension graph, the area when the rubber is loaded...