Elastic collision Definition and 523 Threads

Homework Statement A 5.5 kg object moving in the +x direction at 5.5 m/s collides head-on with a 2.5 kg object moving in the -x direction at 4.0 m/s. Find the final velocity of each mass for each of the following situations. (Take the positive direction to be +x.) The equation is elastic...

Homework Statement Had to translate the original problem statement in order to post it here; sorry about the grammar. Block 1 has a mass m1=2.00kg, moving to the right (along the x-axis) with an initial velocity vi1=10.0 m/s. Block 2 has a mass m2=5.00kg and is moving in the same direction...

Homework Statement Two hard spheres collide elastically. Sphere 1 has a mass of 2 kg and an initial velocity of 3 m/s. Sphere 2 has a mass of 4 kg and is initially at rest. Sphere 1 collides head on with sphere 2 and comes to an immediate stop. Solve for the velocity of mass 2 using (a)...

Homework Statement A package of mass m is released from rest at a warehouse loading dock and slides down a 3.0m high frictionless chute to a waiting truck. Unfortunately, the truck driver went on a break without having removed the previous package, of mass 2m, from the bottom of the chute...

Homework Statement An object of mass 15kg going to the right with a speed of 3 m/s collisdes with a 10kg object at rest. if the collision is ocmpletely elastic, calculate the speed of the 10kg object after collision Homework Equations m1vli +m2v2i=m1vlf+m2v2f The Attempt at a...

Homework Statement I the center of mass reference frame, a particle with mass m1 and momentum p1 makes an elastic head on collision with a second particle of mass m2 and momentum p2=-p1. After the collision the first particles momentum is p1'. Write the total kinetic initial energy in terms...

Homework Statement In a collision a light object and a heavy object (elastic) which one has more KE? Does the answer depend on the initial speeds? Homework Equations Conservation of KE The Attempt at a Solution Since this is an elastic collision, KE is conserved. However, I was thinking...

Homework Statement This is an exam prep question Particle A has mass 3m and velocity i + 2j, it collides with particle B mass m velocity -i + j. Collision is elastic. After collision Particle A is observed to be moving along the +ve y-axis. Find the final speeds of the two particles.(two...

Hi, here's my problem. A particle of m1 and initial speed v0 strikes a stationary particle of mass m2, and scatters at 30 degrees to its original direction with speed v0/3. Find the angle, in degrees, between the directions of the two particles after the collision. I found that the...

Hi, here's my problem. A particle of m1 and initial speed v0 strikes a stationary particle of mass m2, and scatters at 30 degrees to its original direction with speed v0/3. Find the angle, in degrees, between the directions of the two particles after the collision. I found that the...

Homework Statement A body of mass, m makes a head on perfectly elastic collision with a body of mass, M initially at rest. Show that \frac{\triangle E}{E_o}=\frac{4(\frac{M}{m})}{(1+\frac{M}{m})^2} Homework Equations The Attempt at a Solution Momentum: mu_1=mv_1+Mv_2...

Homework Statement ok so I was trying to figure out how to derive the formula for true elastic collision and I came up with the following but I want to make sure I didn't make a mistake.Homework Equations (K1+K2)before=(K1+K2)after 1/2 m1 v1^2 + 1/2 m2 u1^2 = 1/2 m1 v2^2 + 1/2 m2 u2^2 m1v1 +...

Homework Statement This is actually a lab- A ball projectile is fired from a spring gun into a free-hanging pendulum, the pendulum catches the ball and travels a certain vertical measurement. #1-Is this an elastic equation #2-Calculate the kinetic energy the instant before and the...

Hey guys I am completely stuck and have no idea where to start. Help? Homework Statement Car A and Car B collide in an elastic collision. Use the data in the table shown to calculate the maximum compression of the car bumpers. The spring constant of the car bumper is 60 000 N/m. Assume...

Hi, If I have two 1 kg masses that are going to hit each other. Mass A is traveling at 10 ms and Mass B is at rest but I wish to cause for an Inelastic Collision. How do I achieve this? As best I can make of it, I would require a buffer between mass A & B... and I would expect this buffer...

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 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...

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 +...

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...

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

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...

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...

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 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...

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 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...

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...

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 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...

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...

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 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...