E14.A railroad car with a mass of 33000.0 kg collides and couples with a second car of mass 10000 kg that is initially at rest. The first car is moving with a speed of 6.0m/s prior to the collision. If external forces can be ignored, what is the final velocity of the two railroad cars after they couple?

4. A 0.240 kg tennis ball is hit forward with a speed of 26.0 m/s. It is returned in the opposite direction at 37.5 m/s. What is the magnitude of the ball's change in momentum in this scenario?

A car, with a mass of 1240 kg, is moving towards an intersection at a velocity of 26.6 m/s towards the South. At the intersection, it collides with a truck that has a mass of 1580 kg and is moving with a velocity of 14.0 m/s towards the West. When they collide, the two vehicles stick together. 15. The magnitude of the final velocity for the car and truck is Answer to 3 significant digits. m/s. (Record your answer in the numerical-response section below.) Your answer:

1. A firecracker travels straight up at 75.0m/s and explodes into two pieces. The smaller piece carries one third of the firecracker's mass and shoots off horizontally at 48.0m/s west. Determine the speed and direction of the other piece directly after the explosion. 2. Three blocks slide on a smooth surface. Initially, the first block (m1=1.0kg) moves at 3.0m/s to the right, the second block (m2=2.0kg) is at rest, and the third block (m3=3.0kg) moves to the left at 0.50m/s. First, m1 collides elastically with m2 and recoils to the left. Afterwards, m2 and m3 collide and stick. Calculate, a. the velocities of m1 and m2 after the first collision. b. the velocity of m2 and m3 after the second collision.

Two cars each with a speed of 30 m/s are sliding on frictionless ice at an intersection and collide. Car #1 has mass 1400 kg and Car#2 has mass 1300 kg. The cars stick together after colliding. A) What is the angle the combined mass comes off the collision at ? B)What is the speed of the combined mass?

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4. A block of mass 1.90 kg is placed on a frictionless floor and initially pushed northward, whereupon it begins sliding with a constant speed of 3.59 m/s. It eventually collides with a second, stationary block, of mass 4.53 kg, head-on, and rebounds back to the south. The collision is 100% elastic. What will be the speeds of the 1.90-kg and 4.53-kg blocks, respectively, after this collision?     1.47 m/s and 2.12 m/s     2.12 m/s and 1.47 m/s     2.68 m/s and 1.80 m/s     1.03 m/s and 1.64 m/s

A 105.0-kg hockey player is skating in the positive x-direction at a speed of 7.10 m/s and collides with 79.0-kg player moving in the negative y- direction at a speed of 8.00 m/s. They hold on to each other in a totally inelastic collision. a. Find the angle relative to the x-axis of their final velocity. b. Find the final speed of the pair assuming that friction can be ignored. c. Find the impulse of heavier player on the lighter player. d. Find the kinetic energy lost in the collision.

1.Two cars collide at an intersection and stick together. Car A, with a mass of 1200 kg , was going east at vA = 25 m/s before the collision while car B, of mass 1600 kg , was going north at vB = 16 m/s . What is the speed of the cars after the collision?   2.A head-on, elastic collision between two particles with equal initial speed v leaves the more massive particle (mass m1 ) at rest. The less massive particle has mass m2 . Find the ratio of the particle masses. Then find the final speed of the less massive particle.

Particle 1 has mass m1= 2 kg and velocity v1= 10 m/s . It collides with particle 2 which has mass m2= 20 kg and velocity = -4 m/s. If the velocity of particle 2 after the collision is v2 = - 1.5m/s a. Find the velocity ( ) of particle 1 after the collision. b. Draw a diagram(arrows) representing the masses and velocities before and after the collision.