Elastic collision Definition and 523 Threads

Homework Statement Two billiard balls of equal mass undergo a perfectly elastic head on collision. If one ball's initial speed was 2.00 m/s, and the other's was 3.00 m/s in the opposite direction, what will their speeds be after the collision? Va = 2 m/s Vb = 3 m/s Homework...

Homework Statement A ball of mass m moving with velocity v strikes a vertical wall. The angle between the ball's initial velocity vector and the wall is theta_i as shown on the diagram, which depicts the situation as seen from above. The duration of the collision between the ball and the wall...

Mass of cart A: 1kg Mass of Cart B: 3Kg Spring potential energy: 24 Joules Two carts are pushed apart when the spring is released. Thats all the given and I'm suppose to find the final velocity. I have no idea how to get started. For me to use Es=(1/2)K*DeltaX^2, i don't have delta x or...

Homework Statement A softball of mass 0.220 kg that is moving with a speed of 8.4 m/s collides head-on and elastically with another ball initially at rest. Afterward the incoming softball bounces backward with a speed of 3.4 m/s. Homework Equations KE final = KE initial The Attempt...

[SOLVED] Elastic collision in 2 dimensions Homework Statement A ball with mass m and initial velocity v1i collides elastically with a second ball of the same mass that is initially at rest. After the collision, the first ball moves away at an angle of θ1 with respect to the initial...

Hi. First of all, this question seems a bit obscure to me (like there are data missing) However, I quote it as it appeared in the source, so probably there aren't. Second, it is a question from a previous exam, so it is not graded or anything, and there is no problem helping me solving...

Homework Statement A ball of mass 5.0kg moving at a speed of 5.0m/s has a head on collision with a stationary bal of mass 6.0kg. If the collision were perfectly elastic what would be the speeds of the two balls after the collision? Homework Equations P = mv KE = 0.5mv2 The Attempt at...

Homework Statement A ball of mass m = 100g , falls at an height of 5,2m and it collides elastically with the floor and comes up again. Find the height h2 (how much the ball has come up), the impulse, the average force if the collision lasts 0,02seconds. Homework Equations The...

An "infinitely massive" Ping-Pong paddle moving with a velocity of 20 m/s hits a "massless" Ping-Pong ball at rest. The collision is elastic. What is the velocity of the ball after the collision? i get v2f = (2(infinite mass)/(infinite mass - 0))*20m/s = 40m/s is this correct?? i don't...

Homework Statement Two carts equipped with spring bumpers on an air track have an elastic collision. The 253-g cart has an initial velocity of 1.80 m/s [N]. The 232-g cart is initially stationary. What is the velocity of each cart after the collision?Homework Equations I know because cart 2 is...

Homework Statement Object 1 with velocity v hits object 2, of same mass at velocity 2. Prove that the angle between them after the collision is equal to 90 degrees. Homework Equations PE inital = PE final KE initial = KE final The Attempt at a Solution P x component m1 x v1 + 0...

Homework Statement Two identical cars approach each other on a straight road. The red car has a velocity of 40MPH to the left and the green car has a velocity of 80MPH to the right. A spring is attached to the front bumper so that a head-on collision will be elastic. If the maximum indentation...

Homework Statement An object of 2kg moving at 3m/s hits a 4 kg stationary object, causing the stationary object to begin moving at 0.5m/s. How fast is the original object now travelling? It is an elastic collision. Homework Equations Not really sure, 1/2mv^2 I presume. The...

Calculating maximum heright of Mass 1 after elastic collision? Homework Statement Here is the question: Two blocks are free to slide along the ramp. The bloack of m1 = 5.00kg is released from the position at the top of ramp at height h = 5.00m above the flat part of the track. Protruding...

Homework Statement Two balls with masses m1 and m2 moving on a horizontal table in the same direction but at different speeds collide elastically. Obtain expressions for the position and motion of the centre of mass in terms of the separate positions and motions of the two balls before...

1. A pendulum bob of mass m is released from a height H above the lowest point. It collides at the lowest point with another pendulum of the same length but with a bob of mass 2m initially at rest. Find the heights to which the bobs rise given that the collision is (A) Completely Inelastic...

Hi, I came across this question which i couldn't figure out why the kinetic energy of the table-tennis ball is greater than the bowling ball after collision. Qn: A table-tennis ball is thrown at a stationary bowling ball. The table-tennis ball makes a one-dimensional elastic collision and...

Hi everyone. I would really appreciate if I could get some help with this problem elastic collision problem. I will provide the question and the solution as shown in my textbook. What I would like to know if specifically how they used the equation, V2ix-V1ix = -(V2fx-V1fx), and why they arranged...

In an inelastic collision, it is said that the total KE is not conserved but the total momentum is. When both the momentum and KE are the products of mass and some power of velocity, how total value of one remains constant and the other not. This is very confusing.

Homework Statement Prove that in an elastic collision between two identical bodies, one of which is initially at rest, the angle between their velocities after collision is pi/2, except for the case of central impact. Homework Equations Assume particle 1 travels in the x direction with...

Homework Statement There is a ball rolling on a frictionless horizontal surface of mass m and with velocity 5m/s. It collides elastically with a block mass 3m that is initially hanging at rest from a 50 cm wire that is hanging from the ceiling.Find the maximum angle through which the block...

(This isn't homework help, but it's something that's been on my homework (and other places in my mechanics class)...I don't know if it belongs here or in the homework section. If I'm wrong, sorry -_-) I've had a few questions now in class about a two-dimensional elastic collision between two...

Homework Statement Let two particles of collide in a perfectly elastic collision. Particle 1 has a mass of 2m, while particle 2 has a mass of m. Particle 1 has initial velocity v, directed to the right, while particle 2 is at rest. What are the final velocities, v1 and v2, of particle 1 and...

Hi everyone! I'm new to this forum. I enjoy physics but I'm full of doubts :) Now I'm trying to understand how motion is transmited through collisions and I can't understand why elastic collisions keep kinetic energy constant and why constant of restitution equals one. I just imagine that the...

Homework Statement Thomas the train and Diesel are involved in an elastic collision. A 2.5 kg Thomas is, at rest but is approached head-on by a 5.0 kg Diesel moving at 0.60 m/s. The force-separation graph for the ensuing collision is given: http://tinypic.com/r/2zyftae/7 a. What is the...

Homework Statement A 100 g ball bounces off a wall elastically. Its initial speed is 3 m/s perpendicular to the wall. If the collision lasts for 10 ms, what is the average force exerted by the wall on the ball? Homework Equations F=ma Conservation of energy & momentum (?) F=dP/dt...

Homework Statement A steel ball with a velocity of 2.7 m/s collides elastically with an identical stationary steel ball, and ends up going at a 40. degree angle with its original path. What is the direction of the other ball? What is the final velocity of each? Homework Equations...

Homework Statement In an elastic collision, kinetic energy is conserved. That said, I do not have a specific question, but rather a broad, conceptual problem. Consider two similar masses of mass m. m1 approaches m2, with an initial velocity v1i and makes an elastic collision. Under what...

Homework Statement A .1 m ramp is sitting at the edge of a horizontal surface that is 1 m from the ground. One ball is resting at the top of a ramp and another ball is resting at the bottom of the ramp where it is flattened. Each ball has a mass of .05 kg. Ball one is released and hits ball...

Just a quick question, does working in the laboratory frame mean particle 2 will be stationary and thus this can be done more simply?

Homework Statement I must be overlooking something here. In an elastic collision, both momentum and kinetic energy are conserved, right? The math is not making sense...Homework Equations Momentum is conserved: m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1} + m_{2}v_{2} and kinetic energy is conserved...

Homework Statement a) Initially, mass one (2.40 kg) has a velocity of 5.70 m/s and mass two (2.20 kg) is at rest. After they collide, mass one emerges at an angle theta = 31.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are...

Homework Statement A very small mosquito is flying west at 5 m/s, when a very massive dinosaur is going east at 3 m/s charges right into it. If the collision is elastic what is the speed of the mosquito when it bounces off the dinosaur.Homework Equations Ek= 1/2 mv^2 P=mvThe Attempt at a...

A 750- kg car stopped at an intersection is rear-ended by a 1790- kg truck moving with a speed of 16.0 m/s If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. Find the final speed of the car. 256 =...

Homework Statement A neutron of mass m0 collides with an immobile atomic nucleus of carbon of mass m=12m0. Collision is considered central and elastic. how many times does the kinetic energy of neutron decreases during the collision. Homework Equations m=12m0 m0v0=mu-m0u...

Homework Statement A 250 g steel ball and a 500 g steel ball each hang from 3.5-m-long strings. At rest, the balls hang side by side, barely touching. The 250 g ball is pulled to the left until the angle between its string and vertical is 22 degrees The 500 g ball is pulled to a 22 degree...

Homework Statement A satellite with a mass of 252 kg approaches a large planet at a speed vi,1 = 12.3 km/s. The planet is moving at a speed vi,2 = 11.3 km/s in the opposite direction. The satellite partially orbits the planet and then moves away from the planet in a direction opposite to its...

1. Homework Statement [/b] A neutron (mass 1 u) experiences an elastic head-on collision with a gold nucleus (mass 197 u) that is originally at rest. What percentage of its original kinetic energy does the moving particle lose? Homework Equations Elastic Collision: V1f=...

Homework Statement An a particle of mass 6.6 x 10-27 kg came closest to an atom of lead with a distance of 4.8 x 10-14 m. At what velocity will the a particle rebound directly away if the collision is totally elastic? Mass of the Alpha Particle - 6.6 x 10^-27 kg Alpha particles are...

Homework Statement A HOCKEYPLAYER SKATES AT 7.85 M/S AND HAS A MASS OF 120 KG WHEN HE COLLIDES WITH ANOTHER STAIONARY HOCKEY PLAYER. THE SECOND HOCKEY PLAYER IS NOW MOVING AT 5.67 M/S. FIND THE MASS OF THE SECOND HOCKEY PLAYER AND THE SPEED OF THE FIRST. ASSUME THIS COLLISION IS ELASTIC...

Homework Statement Let's say I hang a ball mass m from the ceiling and my hand holds another ball mass M in my hand and it is d meter above the hanging ball. I throw the ball up with velocity of v_{1} and as the ball I throw up hits the ball hanging on the ceiling, the ball collides...

Consider a collision between a large and small body (golf club/hockey stick/baseball bat and a ball for example). How is it possible to calculate how much the momentum of parts of the body removed from the collision contact point have an effect on the momentum of the smaller body before it...

Homework Statement A cart with mass 340 g moving on a frictionless linear air track at an initial speed of 1.2 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 0.66 m/s. (a) What is...

Homework Statement A 4kg ball moves moving to the east with a speed of 3m/s has an elastic collision with a 2kg ball moving to the west with a speed of 4 m/s. What is the total momentum of the system after collision? Determine the velocities of each ball after collision.Homework Equations p =...

I am trying to program the elastic collision response between a ball and an immovable obstacle (such as a rock with infinite mass). However I can't seem to figure out the angle at which the ball would bounce off of the object. Both objects are to be considered as circles, with their positions...

Homework Statement Two masses of m1 and m2 collide elastically on a horizontal, frictionless surface. m1 is four times the mass of m2, and m1 is originally moving in the positive x direction at 13.8 m/s while m2 is moving in the negative x direction at 10.6 m/s. After the collision, m2...

Homework Statement A 0.50-kg ball that is traveling at 6.0 m/s collides head-on with a 1.00-kg ball moving in the opposite direction at a speed of 12.0 m/s. The 0.50-kg ball bounces backward at 14 m/s after the collision. Find the speed of the second ball after the collision. Homework...

Homework Statement Homework Equations V1f = (m1 - m2 / m1 + m2) * V1i V2f = (2m1 / m1 + m2) * V1i .5mVi^2 + mgyo = .5mVi^2 + mgy1 The Attempt at a Solution V1 = (2gyo)^(1/2) = (2*9.8*.34)^(1/2) = 2.5815 m/s a) V1f = (.650 - 4.40 / .650 + 4.40) * 2.5815 = -1.917 m/s b) V2f = (2*.650 / .650...

Object 1 has a mass of 9.4 kg and is moving eastward with a velocity of 15.3 m/s. It collides with a stationary object. After the collision object 1 recoils with a velocity of -5.3 m/s What is the mass (in kg) of object 2? m2=35.9kg? I don't have time to type my work right now. But will...

Homework Statement (see attachment) The work the did gives the correct answer but i do not understand where a lot of that stuff came from! My first question about the work is how they derived 1/2[(m_1)((v_i)_1)^2] =m_1gh Homework Equations Below is the solution The Attempt at a...