4.

Two objects are involved in a completely inelastic one-dimensional collision. The net external force acting on them is zero. The table lists four possible sets of the initial momenta and kinetic energies of the two objects, as well as their final momenta and kinetic energies. Which is the only set that could occur? Initial Final (Before Collision) (After Collision) Kinetic Kinetic Momentum Momentum Energy Energy Object 1: +6 kg-m/s 15 J +8 kg+m/s 9J Object 2: O kg.m/'s 0J Object 1: +8 kg-m/s 5J +6 kg.m/s 12 J Object 2: -2 kg.m/s 7 J Object 1: -3 kg.m/s 1 J +1 kg-m/s Object 2: +4 kg-m/s 6J Object 1: 0 kg.m/5 3J d. -8 kg-m/s 11 J Object 2: -8 kg.m/s 8 J OC Od O a ObObject 1 is moving along the x axis with an initial momentum +16 kg.m/s, where the + sign indicates that it is moving to the right. As the drawing shows, object 1 collides with a second object that is initially at rest. The collision is not head-on, so the objects move off in different directions after the collision. The net external force acting on the two-object system is zero. After the collision, object 1 has a momentum whose y component is -5 kg.m/s. What is the y-component of the momentum of object 2 after the collision? ty +X 1 O -16 kg-m/s O Okg.m/s O +16 kg-m/s O +5 kg-m/s O The y-component of the momentum of object 2 cannot be determinedA sports car of mass m is moving along a highway at a speed 2v as it passes a luxury car of mass 2m and speed v. In a crash with a stationary concrete wall, which vehicle, if either, requires the largest impulse to bring the vehicle to a stop and why? The luxury car requires the largest impulse because its initial momentum is twice that of the sports car. O The sports car requires the largest impulse because its initial momentum is twice that of the luxury car. O The luxury car requires the largest impulse because its mass is twice that of the sports car. O The sports car requires the largest impulse because its initial kinetic energy is four times that of the luxury car. O The impulse required is the same for both vehicles because they have the same initial momentum