Elastic collision Definition and 523 Threads

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 +...

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...

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...

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 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...

http://img395.imageshack.us/img395/6158/steelballxu7.gif A 35 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 20.8 m. a) With what speed does the ball leave the plate? b) What is the magnitude of the total change in momentum of the...

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...

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...

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 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...

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...

Homework Statement A particle with mass m and speed v collides with another particle with mass m, which is initially stationary. The collision is elastic. Show that the particles travel in perpendicular directions after the collision.Homework Equations 1)initial momentum = final momentum...

I am a bit confused about the definition of elastic collision. What i have studied is, elastic collision is one in which the kinetic energy is conserved. Now, some books also say that elastic collision is one in which both momentum and kinetic energy is conserved. But, is it true that...

A charging elephant with mass 5230kg comes toward you with speed of 4.45m/s. You toss a 0.15 rubber ball at the elephant with a speed of 7.91 m/s. (a) When the ball bounces back toward you, what is the speed? Answer= 16.8 I don't know if the answer is written wrong in the back of the book...

if a block in motion hits one at rest, Ek1i = Ek1f + Ek2f could i also use V1i + V1f = V2i + V2f?

Homework Statement In a physics lab a cube slides down a frictionless incline and elastically strikes another cube at the bottom that is only half it's mass. If the incline is 30 cm high and the table is 90 cm off the floor where does each cube land? Homework Equations mgh=1/2mv^2...

Homework Statement Which of the following is a true statement concerning a comet passing near the sun? (Mass of comet and mass loss are negligible) 1. The momentum of the comet is nearly conserved because the interaction with the sun is similar to an elastic collision. 2. The momentum of...

Homework Statement A positively charged alpha particle is fired, in a direct line, at a positively charged gold nucleus: o--> O o: alpha, O: golden nucleus. Because of their mutual repulsion, the alpha particle does not actually hit the nuleus: it comes to rest, for a...

A glider of mass 0.147 kg is moving to the right on a frictionless, horizontal air track with a speed of 0.720m/s . It has a head-on collision with a glider 0.309 kg that is moving to the left with a speed of 2.26 m/s. Suppose the collision is elastic. Find the magnitude of the final velocity of...

Okay I have been working on this problem forever and I don't know what else to try. Can anyone help me?... A 0.005-kg block is released from rest at the top of a frictionless track 2.50 m above the top of a table. It then collides elastically with a 1.00-kg object that is initially at rest on...

Hello, A very basic question, with a bit of confusion. a ball hitting a wall which is not moving with velocity v in an elastic collision has its momentum conserved, opposite velocity; -v. if the ball is to collide with a wall which has a velocity -v, equal speed towards the ball, what is...

[SOLVED] Elastic collision Homework Statement A proton of mass 'm' collides with a particle of unknown mass at rest. After the collision, the proton and the unknown particle are seen moving at an angle of 90 degrees with respect to each other. What is the mass of the unknown particle. Known...

[SOLVED] Conservation of momentum + elastic collision Hey guys, I couldn't even start this one, tried to think about it, but I'm hitting a blank A block of mass m = 2.20 [kg] slides down a 30 degrees incline which is 3.60 [m] high. At the bottom, it strikes a block of mass M = 7.00 [kg]...

Homework Statement A 110 g ball moving to the right at 4.0 m/s catches up and collides with a 400 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 110 g ball after the collision? Homework Equations KEi=KEf 1/2m1v1i^2 +...

Hello people. New here and I've got a problem here which i would appreciate some help with. Situation : A ball of mass 300g is attached to a massless string of 0.2m suspended at a 90 degree angle to another ball of mass 500g held by a massless string at length 0.2m. Imagine the ball A...

A problem I am working on for a project... Force required to hit a golf ball 76.2 m/s Does the impulse assume the collision is perfectly elastic? I am doing a problem on golf... mass of golf ball .0459 kg velocity of ball is 76.2 m/s time of interaction is .0005 seconds coefficient...

Homework Statement Suppose you hold a small ball of mass m1 in contact with, and directly over, the center of mass of a large ball of mass m2. If you then drop the small ball a short time after dropping the large ball, the small ball rebounds with surprising speed. If we ignore air...

Homework Statement A stationary object with mass m[SIZE="1"]b is struck head-on by an object with mass m[SIZE="1"]a that is moving initially at speed v[SIZE="1"]0. If the collision is elastic, what percentage of the original energy does each object have after the collision? KA2/K1 = ...

Homework Statement bloks b and c have m asses 2m and m respecti vely, and are at rest on a firctionless surface black a also of mass m.. is heading at speed v toward block b as show... determine te final velocity of each block after alll subsequent collisions are over, assum all collision are...

When a ball with mass m collide with another ball with equal mass as m=> m1 at rest, the mathematical proof shows that after the collision, the angle between two masses would be 90' I know that when m> m1 , angle <90' when m<m1 , angle >90' but there is no mathematical proof to show this...

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, is deflected 30.0\circ from its original direction, while asteroid B travels at 45.0 \circ to the original...

Homework Statement A 90-g ball moving at 100 cm/s collides head-on with a stationary 10-g ball. Determine the speed of each after impact if (a) they stick together, (b) the collision is perfectly elastic.Homework Equations p=mvThe Attempt at a Solution I already solved A, but I don't know how...

The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.023 kg and is moving along the x-axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.048 kg and is initially at rest. The collision is not head-on. After the...

Homework Statement Block A of mass, mA = 2.0 kg, is moving on a frictionless surface with a velocity of 5.0 m/s to the right and another block B of mass, mB = 8.0 kg, is moving with a velocity of 3.0 m/s to the left, as shown in the diagram below. The two block eventually collide. a. If...

Homework Statement SEE BELOW: 4th Reply has a Diagram Homework Equations Conservation of Momentum: m1(v1i) +m2(v2i) = m1(v1f) + m2(v2f) Vf^2=Vi^2 + 2a(delta y) Conservation of Kinetic Energy (Elastic Collision): .5m1(v1i^2)+.5m2(v2i) = .5m1(v1f^2)+.5m2(v2f^2) The Attempt at a Solution See...

Homework Statement A tennis ball of mass 57 g is held just above a basketball of mass 590 g. With their centres verticaly aligned, both are released from rest at the same moment, to fall through a distance of 1.2 m. a) Find the magnitude of the downward velocity w/ which the basketball...

Homework Statement On a frictionless surface, a 0.35 kg puck moves horizontally to the right (at an angle of 0°) and a speed of 2.3 m/s. It collides with a 0.23 kg puck that is stationary. After the collision, the puck that was initially moving has a speed of 2.0 m/s and is moving at an angle...

[SOLVED] Perfectly Elastic Collision 1. A particle of mass m and speed V collides at a right angle with a very massive wall in a perfectly elastic collision. What is the magnitude of the change in momentum of the particle? 2. P before colision = P after collision. 3. I think the...

For this question http://tinyurl.com/2btmot the solution for question 6(c) is assume conservation of energy(total kinetic energy before collision = total kinetic energy after collision) I am very confused here. May I know why sometimes when two body collides, the total kinetic energy...

1. Two objects collide M1 = 1kg M2 = 3kg V1 = 2m/s V2 = -4 m/s V1' = ? V2' =? 2. PEi = PEf m1v1 + m2v2 = m1V1' + m2v2' KEi=KEf same as (1/2)(PE^2)/m 3. PEi = PEf ----> 2 - 12 = -10 ---> v2' = (-10 - v1')/3 KEi = KEf ----> 4 + 48 = 52 ----> 156 3Vi^2' + V1^2' +...

[SOLVED] Elastic Collision - but no Final Velocities given! Homework Statement An object of mass 2.0kg is moving at 4.0 m/s to the right. It collides elastically with an object of mass 1.0kg moving at 12.0 m/s to the left. Calculate the velocities of the objects after the collision...