Elastic Definition and 1000 Threads

Homework Statement In a classic curing shot, the shot stone, traveling at 6.0m/s [E] hits a stationary stone. The target stone is propelled at a velocity of 2.0 m/s [East30degreesSouth] What is the velocity of the shot stone after the collision? (Assume the collision is fully elastic)Homework...

Elastic Collision...Problem The problem states. The collison is elastic and head on. One ball has a mass of m1=.250kg and initial velocity of 5.00m/s. The other has a mass of m2=.800kg and is initially at rest. No external forces act on the ball. What are the velocities after collision. So...

Homework Statement Consider a cylindrical specimen of some hypothetical metal alloy that has a diameter of 10mm. A tensile force of 1500 N produces an elastic reduction in diameter of 6.7e-4mm. Compute the elastic modulus of this alloy, given that poisson's ratio is 0.35. Homework...

Homework Statement A 0.06kg tennis ball, moving with a speed of 2.50 m/s, collides head-on with a 0.09kg ball initially moving away from it at a speed of 1.15m/s.Assuming a perfectly elastic collision,what are the speed and direction of each ball after the collision? Homework Equations...

Homework Statement A 5 g box moving to the right at 20 cm/s makes an elastic head on collision with a 10 g box initially at rest. Mass 1 = .005 kg initial Velocity 1 = .2 m/s Mass 2 = .01 kg initial Velocity 2 = 0 m/s a.) what velocity does each box have after the collision? b.) what...

Homework Statement http://hypertextbook.com/physics/mechanics/momentum-two-three/an-elastic-collision-in-2d.pdf Homework Equations P = MV P= (r,θ) p'=mv' m1v1 + m2v2=m1v1' +m2v2' The Attempt at a Solution (2.00kg)(13.42 m/s) + (1.00kg)(12.73 m/s) = (2.00kg)(v1')+ (2.00kg)(21.95...

Homework Statement Originally I was considering this question: "You have a pendulum with a ball of mass m at the end, and the pendulum is held parallel to the ground at equilibrium length so there is no initial spring force. This pendulum is also a spring, however, with spring constant k...

Homework Statement In an isolated system, cart1 (with mass = 1 kg and vi1 = 2) has a perfectly elastic collision with cart2 (with mass = 2 kg and vi2 = 0). Find the velocity of cart1 and the velocity of cart2 after the collision. I have to solve this using kinetic energy and momentum...

Homework Statement Here's the question: Block A in the figure below has mass 1.00 kg, and block B has mass 3.00 kg. The blocks are forced together, compressing a spring S between them; then the system is released from rest on a level, frictionless surface. The spring, which has negligible...

Homework Statement Two air hocky pucks collide head-on elastically on a frictionless surface. The smaller puck has a mass of 0.050 kg and is moving to the right at 5.0 m/s while the larger puck has a mass of 0.10 kg and is moving to the left with a speed of 2.0 m/s. Find the velocity of each...

Homework Statement In an isolated system, cart1 (with mass = 1 kg and vi1 = 2) has a perfectly elastic collision with cart2 (with mass = 2 kg and vi2 = 0). Find the velocity of cart1 and the velocity of cart2 after the collision. Homework Equations 1/2m1vi12 + 1/2m2vi22 = 1/2m1v1f2 +...

When oscillating a ruler with an extended mass on the end, what is the direct relation of the length against the spring constant of the ruler? I heard the spring constant had some relation with the curve of the ruler as it oscillates

Homework Statement Hi, I have a practical to do soon, it's only a basic thing because we've only been doing physics for just over a month - plotting a stress-strain graph for an elastic band... 2. The attempt at a solution Now, I was just going to measure the original length of...

Homework Statement Matthew and Amanda have challenged Trevor and Julie to a curling match, played with perfectly elastic rocks sliding on level frictionless ice. Three rocks are lined up all in a row (perfectly straight line). B is a junior rock and its mass is exactly half of A or C. B and C...

Homework Statement A 70kg man who is ice skating north collides with a 30kg boy who is ice skating west. Immediately after the collision, the man and boy are observed to be moving together with a velocity of 2m/s in a direction 37 degrees north of west. What was the magnitude of the...

Hi.. Anybody knows the Elastic modulus of crazy glue? Thanks

1. The total cross-sectional area of the load-bearing calcified portion of the two forearms bones (radius and ulna) is approximately 2.16cm^2. During a car crash, the forearm is slammed against the dashboard. Tha arm comes to rest from an initial speed of 81.9km/h in 7.72 s. If the arm has an...

Homework Statement I have a 4kg mass (m1) moving at 3m/s towards a 8kg mass (m2) at rest on a 2m long frictionless table that is of unknown height. I solved for the velocities after the collsion m1= 2m/s and m2= 1m/, suppose the two masses were placed so that they left the edges of the table...

Homework Statement A 17g object moving to the right at 32 cm/s overtakes and collides elastically with a 35g object moving in the same direction at 12 cm/s. Find the velocity of the slower object after the collision. Answer in cm/s. B) Find the velocity of the faster object after the...

I have a 4kg mass (m1) moving at 3m/s towards a 8kg mass (m2) at rest on a 2m long frictionless table that is of unknown height. I solved for the velocities after the collsion m1= 2m/s and m2= 1m/, suppose the two masses were placed so that they left the edges of the table in opposite...

Homework Statement Assume an elastic collision (ignoring friction and rotational motion). A queue ball initially moving at 4.3 m/s strikes a stationary eight ball of the same size and mass. After the collision, the queue ball’s final speed is 2.3 m/s . Find the queue ball’s angle with...

Homework Statement By resolving the momentum equations parallel and perpendicular to the incident beam direction, show that α is related to the speed v2 of the recoiling particle by: cos α = m2*v2/(2μ*u1) where μ=m1m2/(m1+m2) Homework Equations See attachment for diagram...

Please help! i know how to do a elastic collisions in 1 dimension, but the 2D is too confusing...here is my problem: You have a blue ball with a mass of 1.5 kg moving with a speed of 4.5 m/s in a direction below the positive x-axis. You have a red ball with a mass of 3.6 kg moving with a...

Homework Statement Minnie mouse (mass m=37.5g) has run to the top of a curved frictionless wedge (height H1=1.15m) She slides down the track and makes a perfectly elastic collision with mickey mouse (mass m=69.8 g) who is at rest. Mickey flies off the table (height H2= .993 m) above the floor...

Hi, I am new to the forums & I have a question about the following problem: A 0.10 kg object moving initially with a velocity of 0.20 m/s makes an elastic head-on collision with a 0.15 kg object initially at rest. What percentage of the original kinetic energy is retained by the 0.10 kg...

Hi I am trying to find at what hight i need to drop a egg from 2-6 meters. We will start with 2 meters. The weight of the egg and device holding the egg is .11kg together. I no the formulas for EPE and EP " EPE=1/2KX^2 AND PE=mgh. The question is now how to find where on the elastic band to...

Hi I am trying to find at what hight i need to drop a egg from 2-6 meters. We will start with 2 meters. The weight of the egg and device holding the egg is .11kg together. I no the formulas for EPE and EP " EPE=1/2KX^2 AND PE=mgh. The question is now how to find where on the elastic band to...

a .900 kg object is moving east at 2.8 m/s. a 1.30 kg object is moving west at 1.4 m/s. If the collision is perfectly elastic find the velocities after the collision. (neglect friction) I know momentum and kinetic energy is conserved but I am really clueless as to what to do. Please help me...

Homework Statement A 15 g ball is fired horizontally with speed v0 toward a 117 g ball hanging motionless from a 1.53-m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 117 g ball swings out to a maximum angle θmax=53°. What was v0? Homework Equations...

Is it possible to solve for an elastic collision when vb and v'a are the two unknowns? I have been trying for a few hours to solve for either unknown using the conservation of momentum and the conservation of total kinetic energy equations but have come up with nothing. Can anyone help? mava...

A 0.415-kg hockey puck, moving east with a speed of 2.65 m/s, has a head-on collision with a 0.910-kg puck initially at rest. Assuming a perfectly elastic collision, what will be the velocity of each object after the collision? ======= The solution is: v ' (lighter puck) , v' (heavier...

Homework Statement Homework Statement The mass m1 has the velocity (v1i)\hat{i} and makes an off-center collision with m2=2m1. The final velocities are v1f=a1\hat{i}+b1\hat{j}, and v2f=a2\hat{i}+b2\hat{j}. Assuming elastic collision and v2i=0m/s, obtain the values of a1, a2, and b2 for the...

Homework Statement A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 57.9° angle from its original direction and the unknown atom travels away at a -45.4° angle. What is the mass (in u) of the unknown atom...

A 0.25 kg ball is attached to a 26-cm piece of string. The ball is first raised so that the string is taut and horizontal, then the ball is released so that, at the bottom of its swing, it undergoes an elastic headon collision with a 0.21 -kg ball that is free to roll along a horizontal table...

A proton (mass 1 u) is shot toward an unknown target nucleus at a speed of 2.40×10^6 m/s. The proton rebounds with its speed reduced by 25% while the target nucleus acquires a speed of 3.50×10^5 m/s. What is the mass, in atomic mass units, of the target nucleus? I tried...

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...

Consider a frictionless track ABC as shown in Figure P8.23. A block of mass m1 = 8.00 kg is released from A. It makes a head-on elastic collision at B with a block having a mass of m2 = 14.0 kg that is initially at rest. Calculate the maximum height to which m1 rises after the collision...

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

in a head-on elastic collision between two masses, one of which is stationary, a experimenter would like the incident mass to lose quarter of its kinetic energy in the collision. What must be the ratio of the masses of the two objects for this to be the case?

in a head-on elastic collision between two masses, one of which is stationary, a experimenter would like the incident mass to lose quarter of its kinetic energy in the collision. What must be the ratio of the masses of the two objects for this to be the case?

Homework Statement A proton is traveling to the right at 2.0x10^7 m/s. It has a head on perfectly elastic collision with a carbon atom. The Mass of the Carbon atom is 12 times the mass of the proton. What are the speed and direction of each after collision? Homework Equations...

as I understand it aether theory claims that fields are strain in an elastic medium. the elastic medium can be thought of as a system of springs and masses. (note that the springs store energy proportional to the square of their change in length) I can see how this probably works fine for...

Homework Statement A spring (k=75 N/m) has an equilibrium length of 1 m. The spring is compressed to a length of .5 m and a mass of 2 kg is placed at its free end on a frictionless slope which makes an angle of 41 degrees with respect to the horizontal. The spring is then released. a) If the...

Homework Statement Blocks A (mass 3.50 kg) and B (mass 10.00 kg) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is moving toward it at 9.00 m/s. The blocks are equipped with ideal spring bumpers. The collision is head-on, so all motion before and after...

I'm learning piezoelectricity right now and got an equation I can't understand. It writes the Newton's sencond law for the stresses in materials due to elastic and piezoelectric contribution. The equation is in the attachment. In this equation I'd like to ask what is the partial derivative...

SOLVED Homework Statement Two rock climbers, Bill and Karen, use safety ropes of similar length. Karen's rope is more elastic, called a dynamic rope by climbers. Bill has a static rope, not recommended for safety purposes in pro climbing. Karn falls freely about 2.0m and then the rope stops...

Introduction to Statistical Physics - Silvio Salinas: Consider an elastic ribbon of length L under a tension f. In a quasi-static process, we can write: dU = TdS + fdL + \mudN Suppose that the tension is increased very quickly, from f to f+df, keeping the temperature T fixed. Obtain an...

Suppose we have a rubber band of some elasticity k and of unstreched radius r0 (the band is always kept in the shape of a circle). What work is necessary to strech it to some larger radius r? How do we apply Hooke's law in this situation? Thanks

Homework Statement Puck A has a mass of 0.236 kg and is moving along the x-axis with a velocity of 5.56 m/s. It makes a collision with puck B, which has a mass of 0.472 kg and is initially at rest. The collision is not head-on. After the collision, the two pucks fly apart with the angles shown...

In the usual calculaltion of the Compton effect we assume an elastic collision between a photon and an electron. Energy and momentum of the particles are conserved before and after the collision. In fact, the electron is subject to a high acceleration during the collision, and classically it...