Collision Definition and 1000 Threads

A 0.440kg ice puck, moving east with a speed of 3.16m/s, has a head-on collision with a 0.940kg puck initially at rest. Assuming a perfectly elastic collision, what is the speed of the lighter puck? Use east as the positive axis. I got -2.09. I made two equations and used substitution to...

Homework Statement A 67.6g tennis ball with an initial speed of 28.8m/s hits a wall and rebounds with the same speed. The figure below shows the force of the wall on the ball during the collision. What is the value of Fmax, the maximum value of the contact force during the collision, if the...

Ok.. So basically 100kg object V100 is coming from left to right at 20m/s and 50kg object V50 is coming from right to left at 35m/s and make collision. They get pushed away like on picture. I need to find V50 and V100 but from the looks of it, I need to find angle theta to find an answer. How...

Hello all, I am attempting to simulate collisions of pool balls. For the moment i am doing so without taking rotational momentum or friction between balls into account. right now i have a system that successfully simulates a collision between 1 ball and another ball. Here's how it basically...

Hello, I've been trying to figure out the physica behind a collision of two objects due to the force of gravity. Here's the situation as I'm picturing it: A massive object A is falling due to gravity which impacts a stationary object B being held up by a structure. In this particular case...

Homework Statement A block with mass 4 kg and velocity of 3 m/s collides elastically with block B with mass 2 kg which is originally at rest. Find the velocities of the two blocks after the collision.Homework Equations P= m * vThe Attempt at a Solution This is the first time I try to solve an...

Hi guys, I've been thinking on a problem for a while which really bothers me. I've been trying to mathematically solve the following problem: A train approaches the station at a velocity of V=50 m/s. Then a tennis ball is thrown with a velocity U=30 m/s, against the approaching train...

Homework Statement I was given the following problem and I an trying to discover if it can be answered by transforming to the center of mass frame and then transforming back. "Consider a perfectly elastic collision between a particle moving with kinetic energy 10 times its rest mass energy...

Homework Statement Homework Equations The Attempt at a Solution I've done part (a) and (b) using conservation of momentum and energy..for part (c) I'm not sure how to find the minimum angle ∅. I have also worked out the velocities of m1 and m2 just before the collision as...

Hi all, I would like to ask why only Protons were selected for collision in LHC project? Why not other fundamental particles? When I was watching the programme on big bang by Michio Kaku and Lawrence Krauss, they were saying at the earliest instant of big bang, there were four forces...

Homework Statement Three spheres, each of mass m, can slide freely on a frictionless, horizontal surface. Spheres A and B are attached to an inextensible inelastic cord of length / and are at rest in the position shown when sphere B is struck directly by sphere C which is moving to the right...

Homework Statement A 0.2 kg block, moving at 6 m/s, is catching up and colliding elastically with a 0.6 kg block that is moving along the same line and in the same direction. Find the velocities of the ball after this one-dimensional collision. Homework Equations Conservation of...

Homework Statement A solid sphere rolling on a rough horizontal surface with a linear speed ##v## collides elastically with a fixed smooth, vertical wall. Find the speed of the sphere after it has started pure rolling in backward direction. Homework Equations The Attempt at a...

Homework Statement Asteroid A is traveling at 40.0m/s and collides with asteroid B which is at rest. Both asteroids have the same mass, but asteroid A deflects off of its path by 30.0° above the horizontal, and asteroid B begins to travel 45.0° below the horizontal. What is the speed of...

Homework Statement Homework Equations http://en.wikipedia.org/wiki/Simple_harmonic_motion The Attempt at a Solution So I labeled the image at the points of interest where I would need to calculate certain values. for part a) so from A --> B All I'm trying to figure out...

Homework Statement A 110 kg football player runs at 2.75 m/s directly into a 125 kg player running 2.60 m/s towards him. What is the kinetic energy of the two players if this is a completely inelastic collision. Homework Equations P = m*v Ptotal = Pi - Pf K = 0.5*m*v^2 The...

Here is the problem I am trying Two blocks A and B of same mass M are connected with each other with an ideal string of length 2l passing over an ideal pulley. The block A is connected to a light pan C with an ideal string as shown in figure. A particle of mass \frac{M}{2} is dropped on...

I solved the question , but i need to check it with you guys ... I believe there is something wrong with part b . Homework Statement The 15000kg train A is running at 1.5 m/s on the horizontal tack (to the right) when it encounters a 12000kg train B running at 0.75m/s toward it (to the...

I've got a question that asks what the maximum scattering angle in \nu_\mu e \rightarrow \nu_\mu e is. The electron is stationary in the lab frame and after the collision has E >> m_e. The answer given is \sqrt{\frac{2 m_e}{E_e}}, independent of the neutrino's energy. How can I get...

Homework Statement A bullet with mass mA and velocity vA makes a completely inelastic collision with a still pendulum of mass B. After the collision, the pendulum swings to a height of y from its equilibrium with the bullet in it. In terms of y, mB and mA, what is the initial velocity? My...

1. Two carts, each of mass M, travel towards each other on a frictionless air track, one with velocity V, and the other with -3V. They collide and stick together. How much kinetic energy is lost in the collision? 2. P = mv, KE=1/2mv2 3. Initial KE of the system is the sum of the kinetic...

I'm trying to find out the force on a collision that happened to me recently, nothing serious but the lady went away in the ambulance for what I believe wasn't that much force exerted on her at all. Both vehicles were at a stationary position about 2.5 meters away from each other. The second...

Homework Statement Homework Equations Zero-momentum frame is defined as the frame in which total momentum is zero. The Attempt at a Solution (a) In terms of the zero momentum variables, (e1 and e1 are to distinguish the two resultant particles) \vec{p'}_{HE} +...

A 1689 kg car collides head on with a 2000 kg truck. The collision is elastic. If the velocity of the truck is 17km/h in the same directions as the car's initial velocity, what is the initial speed of the car in km/h? I'm getting an answer but doesn't seem to make sense. So I'm...

Homework Statement A small ball of mass, ##m_1## is aligned above a larger ball of mass ##m_2=0.63kg##, with a slight seperation. The two are dropped simultaneously from a height ##h=1.8m##(Assume the radius of each ball is negligible relative to h.) (a) If the larger ball rebounds elastically...

Two blocks m1 and m2 are connected by an ideal spring of force constant k. The blocks are placed on smooth horizontal surface. A horizontal force F acts on the block m1. Initially spring is relaxed, both the blocks are at rest. What is maximum elongation of spring? i think it would be when...

Homework Statement Question: First image My working: Second image I used Va+Vb for the speed of separation. I got the answer for (a), but couldn't get the answer for (b). I know the proper expression is "Vb-Va" with Vb being negative. But if I use Vb-Va, (a) would be wrong. How come...

Homework Statement A geostationary satellite of mass m, speed v orbits earth. (a) Find expressions for (i) Radius of the orbit, r0. (ii) Satellite's Speed (b) A meteorite with mass m and speed v approaches in the direction towards the centre of the Earth and collides with the satellite...

Homework Statement There are 2 pucks with different masses. Puck 2 is initially at rest, and Puck 1 is moving horizontally in the positive x direction. The collision has sent the pucks off at angles θ1 and θ2 measured relative to the x-axis, along which Puck 1 initially traveled. Assume...

Homework Statement A mass, m1 = 4.5 kg is released form rest 2.5 m above the ground on a inclined plane (35 degrees). m1 slides down incline and makes a smooth transition to flat plane then strikes m2 = 8.2 kg, which is at rest, calculate the speed of both masses after elastic collision and...

Homework Statement A photon of Energy E_0 collides with a free particle of mass m_0 at rest. If the scattered photon flies off at angle θ, what is the scattering angle of the particle, β? Homework Equations The relevant equations are conservation of momentum in x and y direction and...

What would happen if two large planetary masses (such as our earth) collided by their poles (ie, north hits north)? Would the repellent magnetic force be negligible compared to the masses and gravity, or would the collision be altered or averted? Also, while I am thinking about it, what size...

Homework Statement There's an elastic collision between a photon of energy E and an atom in an excited state. After the collision, the energy of the photon is still E but its direction changed of angle of 180° and the atom is now going back with velocity Bc. If the atom is in his ground state...

Homework Statement If the truck was not stationary but was moving horizontally towards the ball at 25 ms-1, what would be the speed of the ball, relative to the ground, after the collision (in ms-1)? Mass of ball = 0.2 kg Mass of truck = 20 tonnes Initial velocity of ball = 20 ms-1 (to the...

Homework Statement Hello everybody , a/There's an elastic collision between a photon of energy E and an electron at rest. After the collision, the energy of the photon is E/2 and propagates in a direction making an angle theta=60° with the initial direction. Find E. What kind of photon is this...

Homework Statement A 10.0 g marble slides to the left with a velocity of magnitude 0.400 m/s on the frictionless, horizontal surface of an icy New York sidewalk and has a head-on, elastic collision with a larger 30.0 g marble sliding to the right with a velocity of magnitude 0.200 m/s. Find...

Hello, I am trying to simulate collisions between polygons with opengl. The weight, velocity (as a 2d vector), the angular velocity and the collisionpoint of the colliding polygons are provided. How can I calculate how the angular velocity and the velocity are changed? I do know how i...

Help needed -- collision of two snowmobiles Homework Statement A police officer arrives at the scene of a collision of the two snowmobiles to find both drivers unconscious. When two vehicles collided, their skis became entangled and the two snowmobiles remained locked together as they...

Homework Statement A billiard ball moving at 5.40 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.48 m/s at an angle of 34.0° with respect to the original line of motion. Assuming an elastic collision (and ignoring friction and rotational...

Two objects of mass M (= 1 kg) each travel with identical speed (|v1| = |v2| = 3 m/s) making an angle of θ relative to the x-axis. After they collide with each other, they travel as one object of mass 2M and with a velocity v3 (|v3| = 2 m/s) in the horizontal direction. What is the value...

Homework Statement "A body of mass m, moving with velocity v, collides with a body of mass 2m at rest, in a head-on collision. The coefficient of restitution is 1/3. If the 2m body has a specific heat c, and if it is assumed that the two bodies share the heat generated in the collision equally...

Homework Statement The figure (Figure 1) is an incomplete momentum bar chart for a collision that lasts 15ms . Figure 1: http://session.masteringphysics.com/problemAsset/1384208/4/knight_Figure_09_06.jpg What is the magnitude of the average collision force exerted on the object? Express...

Homework Statement A ball of clay of mass m travels with velocity v in a path tangent to a disk of radius R and mass M. The clay collides with the disk tangentially to its outer rim ( a totally inelastic collision) and the clay and disk begins to spin about the axis. a) What is the final...

Homework Statement I throw a ball horizontally During the first collsion between the ball and the floor Select one: a. Both horizontal and vertical momentum of the ball are conserved b. The horizontal momentum of the ball decreases and the vertical momentum decreases c. The horizontal...

Homework Statement A 2kg block is resting on a frictionless table. It is hit, head on, by a 1kg block heading at 4 m/s. The larger block is sitting 3m from the edge of a 5m long table. The collision happens with the smaller block's distance being 2m from the table and the larger blocks d =...

English is not my native language. My question is about what happens when we throw a ball on the floor. I understand why the ball bounces off it. But I have a question, I wonder why almost all the kinetic energy get back to the ball, rather than lost in the land, that is, why this energy is...

I wanted to check some concepts in collisions because I'm a little bit confused. In a real-world collision (Where everything applies, friction and so on) conservation of momentum doesn't really apply because there is friction, which is an external force. 1)That is the only reason momentum...

A mass m1 = 6.20 kg is moving North with a velocity of v1 = 13.5 m/s when it collides perpendicularly with another mass m2 = 4.40 kg moving East with a velocity of v2 = 8.80 m/s. Mass m1 runs into mass m2 in an inelastic collision and both masses stick together and move off after the collision...

A ball, which has a mass of m1 = 2.50 kg., is moving with a velocity of 8.00 m/s at an angle of 25.0˚ South of West. It collides with a second ball, which has a mass of m1 = 1.20 kg., which is moving with a velocity of 4.75 m/s at an angle of 61.0˚ North of West. They stick together and move as...

I have problems with a(ii). (please view the first image.) Now I have found that w = (13-8e)u/7 and v = (20e+13)u/7 What I did is like this: (Using NEL) v = 4ue Where the LHS is actually v-0 because I assume Q = 0. (20e+13)u/7 = 4ue e = 33/28 >1 ∴ e cannot exist. 1. Is...