Inelastic Definition and 485 Threads

Homework Statement A block os mass m is attached to a horizontal spring, which is attached to a wall. The block is oscillating without friction with initiation amplitude A0 and maximum velocity v0. When the block is at its maximum amplitude (and therefore instantaneously at rest), is it struck...

Homework Statement A ball with mass 2kg is traveling 2m/s. It impacts and sticks to a hanging, stationary 4kg pendulum. How high will the pendulum + ball go? Homework Equations KE = 1/2mv2 PEg = mgh mava = m(a+b)v(a+b) The Attempt at a Solution I tried to solve this question assuming...

Concerning inelastic collisions: Is it true the kinetic energy after the collision is equal to 1/2 the total momentum?

I'm looking at deep inelastic scattering of a low-energy inelastic electron scattering from a stationary proton target. I am given ##E## and ## \theta ## where ##\theta ## is the scaterring angle. ##E=4.879 GeV , \theta=10^{0} ## I am given a figure of cross section...

A bullet is fired directly into a wood block (along the x-axis), which rests on a rough table. The bullet embeds itself in the block. (This is an inelastic collision: the block deforms and the block and bullet heat up as a result of the collision). a) If the bullet has a mass 0.049kg and is...

Hello, I recently posted a few conceptual questions regarding conservation of momentum. I'm processing the information more easily now, but I've hit yet another bump in the road. I've learned that in an inelastic collision in which "velocity is the same before and after the collision" the...

I was looking up elastic and inelastic collisions and found that and elastic collision is a collision where kinetic energy isn't lost to other forms of energy or heat while an inelastic collision is just the opposite. In physics class we were taught that an elastic collision was a collision of...

I don't understand how momentum is conserved during inelastic collision...please help me out with some relevant and practical examples...thanks

Homework Statement A uniform disk of radius R=1m rotates counterclockwise with angular velocity ω=2rads/s about a fixed perpendicular axle passing through its center. The rotational inertia of the disk relative to this axis is I=9kg⋅m2. A small ball of mass m=1 is launched with speed v=4m/s in...

Homework Statement I am doing this project and it asks me for the before and after velocity of a inelastic collision. Homework EquationsThe Attempt at a Solution I have found the before velocity of both object which is 0 and 15 m/s, however i am trying to find the after velocities right now...

Homework Statement Pete got into into a car accident and collided with another vehicle, which resulted in the death of the second vehicles passenger, David. Whether Pete was speeding or not determines if he goes to jail. The speed limit where he got into the accident was 45mph. How fast was...

Homework Statement Im sorry to annoy anyone with this, i know to smart people these two are easy but I am dumb and i honestly don't understand this. If anyone can tell me and explain this concept then ill be very grateful. I have two days to learn and understand this and i don't know where else...

Hi guys! Im i have to write a paper on neutron an x-ray inelastic scattering. So far I have red a bit of information on this subject. As far as i can tell the main use x-ray an neutron inelastic scattering is determining the phonon energy,wave vector,intensity and so on. The thing is that...

Homework Statement A Rail car with a mass= 27000kg's moving at 4m/s collides with another rail car with mass 80,000kg that was moving towards the first. After the collision, both cars come to a complete stop, what was the initial speed of the second rail car? Homework Equations...

Homework Statement A 2000-kg truck is sitting at rest (in neutral) when it is rear-ended by a 1000-kg car going 28m/s .After the collision, the two vehicles stick together. #1What is the final speed of the car-truck combination? #2What is the kinetic energy of the two-vehicle system before the...

Homework Statement Mass 1 (M1=1 kg) slides on a frictionless surface at v0=1 m/s toward a mass (M2=2 kg) with a spring bumper of force constant k = 20 N/m. The two move together at vf at the instant that the spring is compressed to its maximum x. Find the loss in kinetic energy (KEi-KEf). I...

Homework Statement Two particles are in a perfectly inelastic collision with no external force acting on them. Particle 1 has m1 and v1>0. Particle 2 has mass m2 and v2<0. Find the loss in kinetic energy after the collision. Express your answer in reduced mass as well as relative velocity...

Homework Statement I could not find anywhere an example of inelastic head-on collision, all examples are of bodies crashing into an object at rest. I do not have a specific question, if you have, I'd appreciate it. I just want to know in general: suppose a ball A (of mass 100 kg rolling at...

Hi! I have apparently forgotten way too much college physics, and could really use some help here. I'm trying to calculate the impact force of an instrument (a Schmidt hammer--uses a spring-loaded piston) that produces an impulse against a surface. The instrument registers a rebound value (which...

I have an interesting problem. I am involved in a historical fencing group which uses blunted swords to thrust with (think fencing foils and épées, but heavier and stiffer, with a rubber blunt on the end). We've been discussing various new weapons and needed to address safety. I decided to...

Homework Statement A railway carriage with a mass m = 2.05×104 kg is initially traveling to the left with a speed Vi = 3.24 m/s. It collides and couples with (get stuck to) two identical railway carriages move to the left with a speed of Ui = 2.36 m/s. What is the speed of the railway...

ok, so as i understand an elastic collision conserves energy, and an inelastic collision doesn't conserve energy. also that the energy loss in inelastic collisions is due to the fact that energy is required to "squash" or deform the object. ok, maybe its just the terminology(it probably is)...

Homework Statement A railway carriage with a mass m = 2.45×104 kg is initially traveling to the left with a speed Vi = 3.33 m/s. It collides and couples with (get stuck to) two identical railway carriages move to the left with a speed of Ui = 1.69 m/s. 1. What is the speed of the...

Say I drop a ball of mass 5kg from a height of 2 meters, assuming no air resistance, it will hit the ground with a velocity of 6.26m/s and collide with the ground, and rebound. From the law of conservation of momentum, 6.26 * 5 = v * 5, where v is the new velocity of the ball. But if the ball...

say I have two objects of the same mass. Is the collision always going to be elastic? mv + mv = mv + mv the masses cancel out and thus kinetic energy is conserved right? does this mean that for two cars with exactly the same mass the collision is going to be elastic? if so, would there be...

http://en.wikipedia.org/wiki/Inelastic_collision An inelastic collision, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved. http://journals.aps.org/archive/abstract/10.1103/PhysRev.114.1584 nonelastic (total minus elastic)...

[SIZE="4"]Definition/Summary A collision is said to be inelastic if the total kinetic energy of all the bodies involved in the collision changes. So conservation of kinetic energy does not apply. But conservation of momentum, and of angular momentum, does apply to all unrestrained...

This problem comes from the inelastic collision section. Homework Statement "In Fig. 9-63, block 1 (mass 2.0 kg) is moving rightward at 10 m/s and block 2 (mass 5.0 kg) is moving rightward at 3.0 m/s. The surface is frictionless, and a spring with a spring constant of 1120 N/m is fixed to...

Homework Statement We have a sphere of mass M=0.75 Kg hung from the ceiling by a massless tense cord. Said sphere is hit by a projectile/bullet of mass m=0.015 Kg with velocity v_{0}=300 m/s and they are stuck together (inelastic collision). Find the height the (projectile+sphere) object...

Homework Statement After a completely inelastic collision, two particles of the same mass m and same initial speed v are found to move away together with the speed (2/3)v. Find the angle between the initial velocity vectors of the objects. The Attempt at a Solution It is completely...

Homework Statement https://scontent-a-sjc.xx.fbcdn.net/hphotos-prn1/t1.0-9/603671_1409914319284787_3441607163537875560_n.jpg Homework Equations conservation of total momentum M1V1+M2V2 = MtotVf The Attempt at a Solution I tried using the COTM as such: x...

Homework Statement In Fig. 9-64, block 2 (mass 1.0 kg) is at rest on a frictionless surface and touch- ing the end of an unstretched spring of spring constant 200 N/m. The other end of the spring is fixed to a wall. Block 1 (mass 2.0 kg), traveling at speed v1 = 4.0 m/s, collides with...

Homework Statement Simple question, if a dog jumps on a stationary sled at velocity v.. the dog weighs 20kg. The velocity after is v/2. What is the weight of the sled Homework Equations m1v = (m1 + m2)v/2 The Attempt at a Solution I rearrange this equation and i get m2 = m1.. this...

Homework Statement A head on collision between mass and mass B occurs as described in the F vs s graph below. Complete the table in the data section Find \vec{x}A Find \vec{x}B see attached page for clarification Homework Equations P=m*v \DeltaP=F*t Ek=\stackrel{1}{2}mv2 \vec{d} = \vec{v}t...

Homework Statement Blocks A and B are moving toward each other. Block A has a mass of 2.0 kg and a velocity of 50 m/s, while B has a mass of 4.0 kg and a velocity of -25 m/s. They suffer a completely inelastic collision. The kinetic energy dissipated during the collision is: Homework...

Two masses m_1 and m_2 are closing each other with speeds v_1 and v_2 . The coefficient of restitution is e. Calculate the amount of kinetic energy loss after caused by the collision. I solved it in the center of mass coordinates( v_{cm}=u_{cm}=0 ). The relative speed before and after the...

Football Player 1 (mass m1 = 72 kg) has just caught a pass at the 50 yard line when he is tackled by Football Player 2 (of mass m2). Each player was initially moving at an angle of theta with respect to the 50 yard line at 8.0m/s. the tackle is a perfectly inelastic collision and the players...

Homework Statement A homogenous, thin stick with the mass m and the length l is hanging from the ceiling and can rotate freely around the point P. A small ball with the mass of M is attached to the end of the stick. The small ball on the end of the stick gets hit by another small ball with...

Homework Statement Homework Equations K = E + U E = 1/2mv^2 U = mgh The Attempt at a Solution So I think that for a, half the final velocity of m is equal to the initial velocity of 2m. So that's v = sqrt(2gr)/2? Momentum is not conserved because normal force and gravity are...

So there are a bunch of assignments in physics built on the conservation of momentum law where a bullet of some mass, hits a target of some mass, neglecting friction find the velocity at which the target starts moving. That is all very simple in case of an inelastic collision, all the energy of...

Dear Forum ： I'm looking for proton-proton inelastic cross section in MeV. There are lots of results in GeV, TeV. But I can not find the results in MeV in ENDF nor TENDL. https://www-nds.iaea.org/exfor/endf.htm ftp://ftp.nrg.eu/pub/www/talys/tendl2011/proton_html/proton.html Please advise...

I have to write some training on the following and I really have no idea. Is this correct? Any help is greatly appreciated;) Inelastic scattering In inelastic scattering, a neutron collides with and is temporarily absorbed by the nucleus of the target particle. This excites the nucleus...

Homework Statement http://i.imgur.com/c5pOIe8.png & http://i.imgur.com/zdxfXLE.png Sitting in a parking lot you witness a minor, but still noteworthy collision between two cars. You wondered, "Is momentum really conserved in collisions?" It didn't seem like it was in the real world so...

Homework Statement A halfback with a mass m1=90kg is running up field with a speed of v1=7.6m/s. He is tackled by an opponent with a mass of m2=120kg, who approaches the halfback at an angle of 30 degrees with a velocity of v2=4.0m/s. Assume the collision is perfectly inelastic. a)...

Homework Statement An archer fires a 20g bolt with a speed of105 m/s through a 400 g apple initially at rest. The bolt exits the apple with a speed of 45 m/s. What is the percent change in kinetic energy of the apple/bullet system? m1= 20g Vi1= 105 m/s Vf2= 45 m/s m2= 400g Vi2= 0 m/s Vf2=...

Homework Statement http://puu.sh/5rfl9.png Homework Equations CM = Σmr / Σm L = Σ (r x p) The Attempt at a Solution CM = 0.118 * (0.0036 + 0.00657) / (0.0723 + 0.118) = 0.00630614818 m (from the centre of top disk) L = Σ (r x p) = [0.118 * (0.0036 + 0.00657) /...

I have a couple of simple questions: - wiki says (http://en.wikipedia.org/wiki/Compton_scattering) that it " is an example of inelastic scattering". Is that true?, isn't all energy lost by the photon absorbed by the electron? - is the electron really at rest? doesn't his energy/momentum...

Homework Statement On a frictionless table, a glob of clay of mass 0.380 kg strikes a bar of mass 0.9 kg perpendicularly at a point 0.550 m from the center of the bar and sticks to it. a) a) If the bar is 1.300 m long and the clay is moving at 8.100 m/s before striking the bar, what is the...

Hi everyone, I am stuck with this problems. Homework Statement A block (m1 = 2.5 kg) sits at rest on a horizontal frictionless surface, connected to an unstretched spring (k = 190 N/m) whose other end is fixed to a wall. Another block (m2 = 1.0 kg) whose speed is 4.0 m/s collides head-on...

I'm currently trying to make a proof to convince myself that when two object collide and stick afterwards, there is maximum energy loss. I've been thinking about it and trying to come up with a mathematical proof to solidify the idea in my head. Please tell me if there's any errors in my...