Elastic Definition and 1000 Threads

i don't know how am i supposed to answer this Physics question..all i know its about generating a formula or something like that..here's the problem: 1.a)For an elastic, two-body head-on collisions, show that the general v2 - v1 = - (v2 - v1). That is, relative speed of recession after the...

Given two balls of the same mass of known velocities and known direction (before and after collision) , only one of the ball is not given its velocity and direction before collision and i am supposed to find them . As for the velocity , just take the sum be4 and after collision and evaluate...

Homework Statement Two elastic balls of mass m1 and m2 are placed on top of each other with a small gap between them and then dropped onto the ground. What is ratio m1/m2, for which the upper ball m1 ultimately receives the largest fraction of the total energy? (m1<m2)Homework Equations The...

Homework Statement 1. A blue puck with a mass of 0.0400 kg, sliding with a velocity of magnitude 0.200 ms-1 on a frictionless horizontal table, makes a perfectly elastic, head-on collision with a red puck with mass, m, initially at rest. After the collision, the velocity of the blue puck is...

If I am given that mica has a modulus of 52GPa parallel to the c-axis and 179 GPa perpendicular to the c-axis, how do I figure out the elastic modulus of a polycrystalline mica where grains are oriented randomly?

I have a lab report due tonight. We were working on these in lab and I'm not sure how to tell which one was elastic or inelastic. We had three cases. We had to use the conservation of momentum and kinetic energy formulas.A ) Cart A and B have equal masses. Car B is at rest. Car A strikes car B...

Homework Statement An object (m1 = 5kg) starting from a height of 5 meters, slides down a frictionless track as shown (first object starts in a vertical position, slides down a curved track, and collides with object 2 in a horizontal position) and collides with a second object (m2 = 10kg)...

Homework Statement Using method of integration, determine the elastic curve for the beam and calculate the total deflection at a point A (end) of the beam. Use EI as a constant. See word document attached with diagram. Homework Equations EIV''(x) = - M(x) The Attempt at a Solution...

Homework Statement A spring loaded gun fires a 0.56g ball at an angle of 45 degrees from a horizontal lab bench at a height of 1.30m. The ball strikes the floor 5.64m horizontally (range) from the point of release. If the spring is compressed by 6.50 cm, what is the gun's spring constant...

Hi.. I need a good explanation for the following question. an explanation with a small mathematical calculation to prove the answer would be highly helpful. A copper rod of cross-section 10 mm  10 mm is stretched along its axis, changing length from 1.000 m to 1.001 m. The deformation is...

Homework Statement Longnitudal and transverse soundwaves in nickel (FCC lattice) moves at velocities 5300m/s 3800m/s. Determine the elastic constants Cijkl Homework Equations v =\sqrt{C_{ij}/\rho} The Attempt at a Solution I guess I can calculate Cij with that equation...but I...

Homework Statement Hockey puck B rests on a smooth ice surface and is struck by a second puck A, which has the same mass. Puck A is initially traveling at 15.2 m/s and is deflected 30.0^\circ from its initial direction. The pucks are made of superball-like material, so you may assume that the...

Homework Statement http://www.screencast.com/users/ntrinh3/folders/Jing/media/a4165a56-de0d-4a4a-a01e-49242fd505c4 Need help with question 13 Homework Equations Conservation of energy and momentum occurs in elastic collision The Attempt at a Solution Why would the block 2 have an...

Homework Statement An 10.0 kg ball, hanging from the ceiling by a light wire 125 cm long, is struck in an elastic collision by a 1.20 kg ball moving horizontally at 7.50 m/s just before the collision. Find the tension in the wire just after the collision. Homework Equations M1V1o + M2V1o...

Homework Statement Consider an elastic collision (ignoring friction and rotational motion). A queue ball initially moving at 2.9 m/s strikes a stationary eight ball of the same size and mass. After the collision, the queue ball’s final speed is 1 m/s. Find the queue ball’s angle with respect...

Homework Statement Consider an elastic collision (ignoring friction and rotational motion). A queue ball initially moving at 2.6 m/s strikes a stationary eight ball of the same size and mass. After the collision, the queue ball’s final speed is 1.2 m/s. Find the queue ball’s angle (theta)...

Homework Statement a .060kg tennis ball, moving with a speed of 2.5 m/s, collides head-on with a .09kg ball initially moving away from it at a speed of 1.15m/s. Assuming a perfect collision, what are the speed and direction of each ball after the collision Homework Equations MaVa +...

1-D Perfectly Elastic Collison PLEASE CHECK! THANKS Homework Statement Mass m1 is moving to the right at a velocity of 17.6m/s. Suddenly it strikes a stationary ball. The stationary ball has a mass of .685kg. The collision is perfectly elastic and 1 dimensional. The collision forces m2 to...

Homework Statement I'm given an equation describing a string on an elastic foundation: utt+w20u = c2uxx with the boundary conditions u(0,t)=u(l,t)=0. The Attempt at a Solution I think I understand how to do this problem up to a certain point, but that point occurs when I find the...

Homework Statement A ball of mass 2m is moving with a velocity Vo collides elastically and head-on with another ball of mass m at rest. Find the minimum kinetic energy of the system. Homework Equations K = 1/2 mv2 The Attempt at a Solution I personally do not understand what is...

Homework Statement A pool ball with initial speed v is aimed right between two other pool balls (looks like: 0 -> : if the semicolon were two balls and were touching each other). If the two right balls leave the elastic collision with equal speeds, find the...

Hi I checked this problem many times but I didn't end up with the result wanted. Assume that a particle of rest mass m_0, (relativistic) energy e_0 and (relativistic) momentum p_0 is moving in a straight line. This particle suddenly hits a stationary particle with rest mass M_0 ahead and...

Hello, I'd relly appreciate some guidance on this one: [b]1. The length of a spring increases by 7.0 cm from its relaxed length when a mass of 1.7 kg is hanging in equilibrium from the spring. Spring constant 2.38 N/cm. How much elastic potential energy is stored in the spring? A...

Why is the total kinetic engergy in an elastic collision constant?

Why is e=1 for perfectly elastic collision? How did they arrive with that? Any derivations? Thanks. -Artee Libunao

I'm in the middle of doing an experiment where I find the heat dissipation by hysteresis through the stretching of an elastic band. I have experimentally found out how much heat is dissipated, but I was wondering if there is a way to theoretically find out the dissipated heat, most likely by...

Homework Statement A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest. It swings downward and strikes a block initially at rest on a horizontal frictionless surface. Air resistance is negligible...

Homework Statement I'm completing a homework for Young's Modulus and one question asks to estimate the elastic limit for the wire which was used. I can see where this approximately is on the graph I have drawn. When the question asks to estimate the elastic limit, does this mean to...

say i derive the relationship between the 3 elastic modulii for a sphere. i consider the 3 co-ordinate axes.if stress is applied only along x-axis,there would be a resulting strain along Y and Z. My book derived it for a cube,that was quite simple,but i cannot imagine the resulting strain...

When two objects collide in an elastic collision, aren't there an infinite number of possible velocities that the objects can gain? Let's consider two objects each of mass 1kg. One of them is moving at 1 ms-1 and the other is stationary. After the collision, the first object (the one which was...

How does elastic recoil of arteries stop blood pressure going to zero and artey collapsing? Thanks :smile:

NONElastic Collision Homework Statement One sphere collides with other sphere that has speed of u2 = 0... Both spheres have same mass (m1 = m2 = 0.3 kg)... After collision first sphere has speed of v1 = 0.6 m/s, second sphere v2 = 1.1 m/s ... How much of kinetic energy has been transformed...

Homework Statement A uniform rectangular tile drops without spinning until its corners reach positions (0; 0; 0); (2a; 0; 0); (2a; 2b; 0); (0; 2b; 0), when it strikes the top of a vertical pole at a point very close to the (0; 0; 0) corner. Just before impact the velocity of the tile was...

Let' say two steel or rubber disks hit each other moving on friction-free surface. During the interaction, both disks deform elastically. My question is, does part of deforming energy gets converted to heat ? Why not ? Why this effect is never mentioned ? Is it negligible ? I know from...

Homework Statement First sphere m=0.3 kg collide noncentraly and elasticaly with other sphere of m= 0.35 kg and transfer 79% of first sphere kinetic energy during that collision... u1 is not defined, u2 = 0 m/s Ratio between speed after collision v1 : v2 = ?? Homework Equations...

Good afternoon, First of all, this is not a homework question, but I'm not sure whether it should be posted on the Homework section. My problem arose when I tried to think about what happens when a spring does work in two blocks. First, consider two blocks (1 and 2) on a frictionless...

Thinking in terms of the conservation of energy, it seems to make sense that if you took a relatively elastic rod with hooks on either end, so that it could be bent all the way around and made to hook to itself (and make a loop), that the energy required to bend it into a closed loop would be...

Homework Statement I am unsure about how to go about solving an oblique elastic collision question, I understand that momentum is conserved and how to calculate momentum but unsure as to how to calculate the vectors. The question is : A 45g marble collides with an identical stationary...

Incidentally in another thread I made this reasoning to calculate the velocity increase in an elastic collision: My questions: (a) I haven't seen this approach in the texts I use. Is this correct? Am I missing anything? (b) If correct, is it also valid for acceleration, not only for...

Homework Statement A mass of 1.5 kg oscillates vertically at the end of a lightweight spring. The spring has a spring constant of 145 Newtons per meter. The amplitude of the motion is 8.00 cm. From this data, complete the table below. I have to find velocity, acceleration, elastic...

Homework Statement Uranium fission within a nuclear reactor produces high-speed neutrons. These must be slowed down for them to trigger a chain reaction within the uranium. In a heavy-water reactor the neutrons of mass m make multiple elastic collisions with deuterium nuclei of 2m, losing...

Here's the problem I've been working on: "A mass is oscillating with amplitude A at the end of a spring. How far (in terms of A) is this mass from the equilibrium position of the spring when the elastic potential energy equals the kinetic energy?" Now I know that Us = 0.5*k*x^2 and K =...

I'm given a stress strain diagram for a sample of steel that has an original diameter of 0.5in and a gauge length of 2in. The sample is loaded to 70ksi and the question asks for the amount of elastic recovery and permanent elongation of the sample. The actual graph is shown below... I know...

1. A mass of 100g is suspended from a light spring and extends the spring by 4cm when the mass in in equilibrium. a) Find the spring constant k of the spring? b) How much elastic energy is now stored in the spring? c) What would be the extension of the spring if a mass of 170g were suspended...

I'm inputing data into a SolidWorks material profile, but I'm having difficulty determining the value of the elastic modulus (psi) of steel reinforced concrete i'm looking at the following source for material properties: http://www.fhwa.dot.gov/pavement/pccp/pubs/05081/chapt3.cfm [for...

Homework Statement After some messey algebra it can be said that V_B = (2 m_A V_o_A)/(m_A + m_B) V_A = ( (M_A - M_B ) V_o_A )/(M_A + M_B) were did this come from? Homework Equations momentum The Attempt at a Solution I don't even know were to start

Just to begin, uhh. I'm 75% sure my work makes logical sense [I hope], and that my problem lies in a computational error. But I really don't know why my answers aren't working out. I've now gone through the problem in 3 different ways, and I keep getting the same answer, but it's apparently...

Homework Statement Suppose that the string in fig 8-12 (just a pendulum released from the side and falls to the bottom) is very elastic, made of rubber, say, and that the string is unextended at length l when the ball is released. a) explain why you would expect the ball to reach a low...

I've tried looking on various websites to find a definition I can understand but every website describes it differently, even the online dictionaries. I have also tried looking in my Y&F University Physics. I just don't <i>understand</i> what elastic hysteresis is because most descriptions don't...

Homework Statement Onto a thick brass rod we attach equally long glass thread. At what temperature change will the glass thread break if the temperature coefficient of linear expansion for brass is α1= 20 x 10 ^-6 K^-1, and for glass is α2= 7 x 10^-6 K^-1? Young’s (elastic) modulus for...