Elastic collision Definition and 531 Threads

In an elastic collision both momentum and kinetic energy are conserved which means only conservative forces are acting (therefore no friction!). So that must mean we also have to be in an isolated system, so no energy is lost due to external forces. Can this state actually exist in reality...

A ball of mass m and a ball of unknown mass M approach each other from opposite directions and have the same speed Vo (but oppositely directed velocities). The ball of M is reduced to rest by the impact, while the ball of mass m has a velocity V1'. What are the ratios a) M / m b) V1' / Vo...

(3) two blocks are free to slide along the frictionless wooden track. a block of mass m1=5.00kg is released from A. Protruding from its front end is the north pole of a strong magnet, repelling the north pole of an identical magnet embedded in the back end of the block of mass m2=10.0kg...

Once again, I am pleading for help. Here is the problem and what I have done: Gayle runs at a speed of 4.00 m/s and dives on a sled, initially at rest, on the top of a frictionless, snow-covered hill. After she has descended a vertical distance of 5.00m, her brother, who is initially at rest...

Say we have a point mass M traveling to the right at velocity V. It strikes a dumbell composed of two masses of M/2 separated by a massless rod of length L. The collision is elastic. I am having some trouble thinking about this... After the collision, the original mass is stationary...

I've done the bulk of this problem (part A) but I still can't figure the last bit (part B): "Consider an elastic head-on collision between a projectile with mass m_a, velocity (vector)v_a, energy E_a, and three-momentum (vector)p_a and a stationary target of mass m_b. (That the collision is...

Does anyone know the equations for 2D elastic collisions.

Let's say I have a stationary object that gets hit on a flat edge by a sharp point of a moving object. Assume that the moving object also has an linear and angular momentum. Assume that the objects have uniform density, there is no deformation, no friction, and that the collision is ellastic...

A ball of mass 0.200 kg has a velocity of 1.50i m/s; a ball of mass 0.300 kg has a velocity of -0.400i m/s (where "i" is supposed to be that unit vector along x-axis). They meet in a head-on elastic collision. (a) Find their velocities after the collision. I know I can use the conservation of...

You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. A friend throws you a ball of mass 0.400 kg that is traveling horizontally at 10.8 m/s. Your mass is 70.4 kg. this is my first answer If you...

In an elastic collision problem, I'm supposed to solve for the mass of the 1st car (m1). I get stuck here. How do I re-write this to solve for m1? u_2=\frac{2*m_1v_1}{m_1+m_2}

Im preparing for an Elastic Collision lab today and was wondering is someone would check my prelab questions. A 5 kg object traveling at 4 m/s collides head on with a 10 kg object moving toward it with a speed of 3 m/s. The 10 kg object stops dead after the collision. a) What is the...

Agh... so I posted a similar question like this yesterday and someone has been so kind enough to help me out, but now I'm stuck on this problem! In the experimental discovery of the neutron (the electrically neutral "brother" of the proton ) the ratio of the velocity of the recoiling (struck)...

Okay, so my homework question is: 5) An object makes an elastic head-on collision with another "target" object which is initially at rest. If the ratio of incident mass over target mass is 0.5333, what is the velocity of the incident object after the collision in multiples of its incident...

A proton, moving with a velocity of v1i collides elastically with another proton that is initially at rest. One proton has three times the speed of the other after the collision. How would I find the speed of each proton after the collision in terms of vi and their velocity vectors after the...

In an elastic collision between two objects. Show that the speed of approach is equal to the speed of seperation. I know you have two equations, the conservation of momentum and the conservation of kinetic energy, but I wouldn't know how to solve the equations.

Here is the problem as it reads out of the book. In the figure, puck 1 of mass .2 kg is sent sliding across the table [frictionless] to undergo a one-dimentional elastic collision with stationary puck 2. Puck 2 then slides off the edge and lands a distance d from the base of the table. Puck...

Hi, I need to find an expression for u1 and u2 using m1, m2, v1 and alpha. See attached image for more details. Thanks in advance, Or Ozery

Is elastic collision defined as a collision where no energy is lost or where no momentum is lost? We had to do a lab in class and one question was whether the collison was elastic. I think we all got it wrong because we sayed it was elastic because momentum was conserved. But we were supposed to...

I'm stumped on this question: A ball of mass m moving with velocity v_i strikes a vertical wall. The angle between the ball's initial velocity vector and the wall is theta_i as shown on the diagram. The duration of the collision between the ball and the wall is delta t, and this collision is...

Consider a cube of uniform density, mass M, sidelengths 2a resting on a frictionless plane. Origin is placed in the cube's center. A rod of length L, attached to the ceiling z=a+L, mass m, hits with its tip the corner (-a,a,a) on the side x=-a with velocity V_{0}\vec{i}. Determine the...

Hello I need help with elastic collisions. I know you have to solve simultaneous equations, but for the problem I'm on, the equation has a power other than one like X2 etc. How do I do this on A TI-83 +? Thank you. Doug

A block of mass m = 2.20 kg slides down a 30 degree incline which is 3.6 m high. At the bottom it strikes a block of mass M = 7 kg which is at rest on the horizontal surface. If the collision is elastic and friction can be ignored, determine the: speeds of the two blocks and how far...

Hey everyone. I am really stuck on a problem that seems simple but I just can't figure it out. The problem goes as follows. There is a collision between two pucks on an air-hockey table. Puck A has a mass of 0.039 kg and is moving along the x-axis with a velocity of +5.5 m/s. It makes a...

A cart of mass M and a second cart of mass 2M collide head on elastically and bounce apart. Which cart experiences a larger magnitude of acceleration during the collision?

Elastic Collision -- Scattering Before I ask my question, here's the problem in full, "A proton of mass mp, with initial velocity v0 collides with a helium atom, mass 4mp, that is initially at rest. If the proton leaves the point of impact at an angle of 45 degrees with its original line of...

A softball of mass 0.220 kg that is moving with a speed of 6.7 m/s collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.2 m/s. (Assume the positive direction is forward.) (a) Calculate the...

hey all... have a question: a body of 2 kg mass makes an elastic collision with another body at rest and afterwards continues to move in the original direction but with one-fourth of it's original speed. What is the mass of the struck body? I started with comparing kinetic energy, then...

Two balls hit each other. One ball with a mass of 2m standing still relative to the earth. The other ball has a mass of 1m and hits the ball of 2m at a certain speed. The collision is elastic. Could you calculate the proportion of Linear Momentum between both balls after the collision with...

What is an elastic collion? I don't understand the difference between elastic, inelastic and explosion collisions.

Here is a little problem i am having with elastic colisions. With inelastic colisions, momentum is conserved but kinetic energy is not. And so from my point of view it would be impossible to have an elastic colision where both momentum and kinetic energy would be conserved as if kinetic...