Elastic Definition and 1000 Threads

Elastic collision, I think? Homework Statement 50kg boulder slides down a 5m high, 20m long hill against friction force 40N. At the top the boulder is moving at 2m/s. At the base of hill the boulder slides on a horizontal frictionless surface for a short distance and then collides with a tree...

Homework Statement .500kg ball attached to a cord that is 70 cm long. ball strikes a 2.5kg block at rest what is the speed of the ball just before hitting the block and collison is perfectly elastic find speed of ball and block after collision Homework Equations The Attempt at...

Homework Statement A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle θ'2 = 41° from the neutron's initial direction. The neutron's initial speed is 6.2 x10^5 m/s...

Hey there! So, I've got this sample exam that I'm working my way through, and I'm stuck on a few questions, but this one is particularly frustrating me: A careless driver rear-ends a car that is stopped at an intersection. Just before the collision, the driver slams on his brakes, locking the...

Homework Statement A 29.0 g ball is fired horizontally with initial speed v0 toward a 100 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 100 g ball swings out to a maximum angle θmax = 50.0° see image for...

Question: Is more elastic potential energy stored in a spring when the spring is compressed by one centimeter than when it is stretched by the same amount? my conclusion: part of the definition in the book states that Elastic Potential Energy is the energy that a spring has by virtue...

Homework Statement A 47.0g ball is fired horizontally with initial speed (Vo) toward a 110g ball that is hanging motionless from a 1.00m -long string. The balls undergo a head-on, perfectly elastic collision, after which the 110g ball swings out to a maximum angle theta = 52.0 degrees. What...

One ball traveling at 17.7 m/s strikes a second ball at rest in an elastic collision. If the mass of the first ball is 30 kg and the mass of the second is 1.2 kg, to the nearest tenth of a m/s what is the velocity of the first ball after the collision? Homework Equations

Homework Statement I can't believe I cannot get this! I am trying to help out my gf with this problem: A 5 kg ball moving at 2 m/s to the right collides with a 7.5 kg stationary ball. If the collision is elastic, what are the final velocities of the 2 balls? Homework Equations...

Homework Statement A pinball machine launches a 90g ball with a spring driven plunger. The game board is inclined at an angle of 6\circ above the horizontal. Assume the plunger's mass and frictional effects are negligible. The acceleration of gravity is 9.8m/s2. Find the force...

Homework Statement Suppose you have a mass/spring system (with spring constant k) buried underground such that its relaxed (equilibrium) position is level with the ground. Then suppose someone takes a small ball of mass m and compresses the spring a distance xo below the mass/spring's...

Homework Statement A 120 g ball moving to the right at 4.5 m/s catches up and collides with a 420 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what is the speed of the 420 g ball after the collision? Homework Equations m_1v_{1i}+}m_2v_{2i} =...

I am struggling with a problem that I could really use some assistance on. The problem sounds simple enough, but I am lost. here it is: Block A is on a frictionless table with block B. Block B is at rest, block A heads toward B and collides in an elastic collision. Block B falls off of...

I feel so confused right now, I'm probably over thinking this though. Please help! 1) A slingshot consists of a light leather cup, containing a stone, that is pulled back against two parallel rubber bands. It takes a force of 11 N to stretch either one of these bands 1.1 cm. (a) What is the...

Homework Statement Particle 1 of mass m moving with speed v in the +x direction has an elastic collision with particle 2 of mass 3m which was originally at rest. After the collision, particle 2 is moving in the +x direction. What is its speed? Homework Equations deltap = 0 pf1 + pf2 =...

Homework Statement The setup is there are two pucks (m1, m2) on an air table and they undergo elastic collision while m2 is stationary. I am asked to find the angle between the two velocities but I can't figure out how without being giving at least one angle. Variables: m1 = 28.0 g = 0.28...

Homework Statement I am basically being asked to use the law of conservation of momentum and kinetic energy to derive two equations for the final velocity of the two masses involved in the system. (i.e. \acute{v_{1}} and \acute{v_{2}}) Homework Equations Conservation of Momentum...

Homework Statement A rapidly moving body of mass m1 strikes a body of mass m2 at rest in a head-on elastic collision. How does m1 compare with m2 if the first body (m1) a. stops? b. comes back along its path at very nearly the same speed it had before the collision? c. continues along in...

[SOLVED] Elastic and gravitational potential energy First off, long time lurker here on his first post. Your forum seems absolutely brilliant, so I hope you can help me :) Homework Statement A box on an elastic string is dropped down an incline and proceeds to slide the distance L before...

Homework Statement Consider a hollow drive shaft of length L, inner radius b, outer radius a. A constant torque is applied (we can assume one end of the shaft is fixed because we're applying a constant torque T regardless of the angular velocity of the shaft). We know material properties of the...

Hi guys, I was thinking of a problem the other day; consider a group of particles, connected to each other by light elastic strings, there is no restriction on which particles can be connected to which, then can one determine the position of a particle at time t. So I set about trying to...

Homework Statement A 20g ball is fired horizontally with initial speed v[SIZE="1"]i toward a 100g ball that is hanging motionless from a 1.0m long string. The balls undergo a head-on, perfectly elastic collision after which the 100g ball swings out to a maximum angle of 50degrees. What was...

Homework Statement In a pool game, the cue ball, which has an initial speed of 8.0 m/s, make an elastic collision with the eight ball, which is initially at rest. After the collision, the eight ball moves at an angle of 30° to the original direction of the cue ball. Homework Equations V8...

Homework Statement Consider a string on elastic foundations as shown in the following figure: http://img81.imageshack.us/img81/5255/imageqv.png The Strong form is given by http://img35.imageshack.us/img35/2302/image2yxq.png Where U(x) is the transverse displacement, p(x) is the...

Two balls Y and Z collide elastically in space. If Z is initially at rest how would you choose it's mass in relation to Y so that it would recoil with the greatest (1) KE (2) Momentum Kinetic Energy: KE = (1/2)mv^2 Momentum: P = mv Would you have to have a smaller mass for Z so that...

Homework Statement A handball of mass 668 grams is thrown straight against a wall with a speed of 13.36 m/s. It rebounds straight back out with the same speed. The average force exerted on the wall by the ball is 12 N. How long is the ball in contact with the wall? Homework Equations...

Homework Statement a proton with kinetic energy 10GeV collides with a proton at rest. 1 proton goes off with an angle of 45 degrees relative to the incoming proton. Find the velocity of both protons after the collison. This is an ellastic collision. E(initial) = 938 mev i honestly don't know...

Homework Statement A 0.24kg object traveling rightward at 3.5m/s collides head-on and elastically with a 0.40kg object traveling leftward at 2.1m/s. What are their velocities after the collision? If the objects are in contact for 0.010s during the collision, what is the magnitude of the...

Homework Statement Two asteroids of equal mass in the asteroid belt between Mars and Jupiter collide with a glancing blow. Asteroid A, which was initially traveling at 40.0 m/s with respect to an inertial frame in which asteroid B was at rest, is deflected 30.0 degrees from its original...

Okay, i have a problem here with 2 dimensional elastic collision between 2 balls with equal mass, they are both moving in different directions before collision what i know: vx and vy of both balls, the slope of their movement, which can be converted to an angle with tan-1 x the problem is all...

Homework Statement A block of mass m1 = 5.00 kg is released from A. It makes a head on elastic collision at B with a block of mass m2=10.0kg that is initially at rest. Calculate the maximum height to which m1 rises after the collision Homework Equations Pi = Pf Ef= Ei + other work...

Homework Statement Cart1, with mass m, is initially at rest and is struck by cart2, which has a mass of 337 kg and initial speed of 2.07 m/s. The collision is elastic and after the collision cart2 continues to move in its original direction at 0.900 m/s. Find m, the mass of cart1...

A particle of mass m is attached to one end of an elastic spring of natural length l and modulous lambda ..The particle and spring rest on a rough horizontal surface and the other end of the spring is fixed..Th coefficient of friction is mu .the particle is held at rest with the spring...

Homework Statement Particle 1 of mass m1 = 0.30 kg slides rightward along an x-axis on a frictionless floor with a speed of 2.0 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall...

Homework Statement Block 1 of mass m1 slides along an x-axis on a frictionless floor with a speed of 2.40 m/s. Then it undergoes a one-dimensional elastic collision with stationary block 2 of mass m2 = 2.00m1. Next, block 2 undergoes a one-dimensional elastic collision with stationary block...

Homework Statement A cart with mass 310 g moving on a frictionless linear air track at an initial speed of 1.4 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision, the first cart continues in its original direction at 0.64 m/s...

Elastic collision please help! Homework Statement Please help me... A 200 g block is released from rest at a height of 25 cm on a frictionless 30 degree incline. it slides down the incline and then along a frictionless surface until it collides elastically wt an 800 g block at rest...

Homework Statement A spring with spring constant k is hanging from the ceiling, at equilibrium point. The length of the spring in equilibrium is h2. Then you hang a mass less string from the end of the spring, holding a mass m. The length of the string and the mass together equal y. The...

Homework Statement A ball rolls off the end of a table of height H. The ball has speed S when it leaves the horizontal table top. We wish to place a can of height h and diameter D at the correct distance from the table’s edge so that the ball lands in the can (aim for the top center of the...

Homework Statement A nuclear fusion reaction occurs when a deuterium nucleus, mass 2m, and a tritium nucleus, mass 3m, combine (each with velocity v in opposite directions). Most of the energy released in the fusion is carried away in the kinetic energy of the product neutron, mass m, and...

Homework Statement The figure shows a 2kg block moving at a speed of 0.5ms-1 on a smooth horizontal surface. It collides head-on elastically with an initially stationary block of mass 3kg which is fitted with a light spring. What is the maximum elastic potential energy stored in the spring...

Homework Statement A bullet with a mass of 3.25 g is fired horizontally at two blocks resting on a smooth and frictionless table top as shown in the Figure. The bullet passes through the first 1.25 kg block, and embeds itself in a second 1.80 kg block. Speeds v1 = 2.40 m/s and v2 = 2.60 m/s...

Homework Statement Two pool balls hit head on. V(1) = 2.0 m/s west, V(2) = 5 m/s east. Mass is the same for each ball. Homework Equations The Attempt at a Solution m(1)*(-2m/s)^2 + m(2)*(5m/s)^2 =? no idea...I just know that each ball should be going the same speed and direction as the...

Homework Statement Two particles of masses m and 8m move toward each other along the x-axis with the same initial speeds of 9.69 m/s. Mass m is traveling to the left and mass 8m to the right. They undergo a head-on elastic collision, and each rebounds along the same line as it approached...

1. How does a cart being pulled by an elastic cord effect the acceleration of that cart? 2. That's the problem. I can't find any equations that deal with motion of an object pulled by an elastic cord. I was thinking there may be something to do with elastic potential energy...

I tried to use Lagrangian and Hamiltonian to solve 1-D elastic collision, but I got nothing but constant velocity motion. Is it because I miss some constraint? Such as the motion is colinear or something?But how to write a constraint like colinear? Or it's not actually solvable with Hamiltonian...

Homework Statement A neutron has an elastic collision with a stationary deuteron. Mass of neutron is 1 amu, mass of deuteron is 2 amu. the neutron is deflected through 90 degree angle. Prove that the neutron loses 2/3 of it's initial kinetic energy to the deuteron. Homework Equations...

Homework Statement Show that the constitutive equation for an elastic solid can be expressed in the form: Tij=\frac{1}{2}\frac{\rho}{\rho0}\frac{\partial(xi)}{\partial(XR)}\frac{\partial(xj)}{\partial(XS)}(\frac{\partial(W)}{\partial(\gammaRS)}+\frac{\partial(W)}{\partial(\gammaSR)})...

Is anyone familiar with materials which possesses a high tensile strength, but also a low young's modulus (high compliance)? I'm interested in a material which can support large deflections, while offering minimal resistance to it. Also, I'm specifically not interested in non-linear materials...

Hi, I want to know that which one is more elastic: steel or rubber. and why?