Momentum is conserved in ... I. Elastic collision. II. Inelastic collision. III. Partially elastic collision. N. Partially inelastic collision.

Q14. Two cars of equal mass, one travelling north, the other east, collide at the same speed at right angles to each other. Assuming the collision is perfectly inelastic, what is the velocity following the collision? a. Ö2 times initial speed, at 45° east of south b. 1//2 times the initial speed, at 45° east of north Ос. twice the initial speed, at 45° east of south d. Ö2 times initial speed, at 45° east of north

3. This problem refers to the figure below: mmm There are 3 identical bobs of mass m hanging side-by-side. Two are then lifted to a height of h and released. The collisions in this problem are elastic. Answer the following questions: (a) Let's call the initial and final state immediately before and after the collision, respectively. Write down the initial momentum and kinetic energy of the system in terms of m and h. (b) Show that, after the collision, the left and center bobs rise to height h while the right bob becomes stationary. In particular, show that the center bob acts as if it were swinging freely as a lone pendulum.

A 1-kg iron ball and a 10-kg iron ball are dropped from rest from the top of a one-story building. When hitting the ground below, compared with the 1-kg ball, the 10-kg ball has A. Less momentum and KE. B. The same momentum and KE. C. 10 times as much momentum and 10 times as much KE. D. 10 times as much momentum and 100 times as much KE.

A 1 500 kg car travelling at 25 m/s collides with a 2 500 kg van stopped at a traffic light. As a result of the collision, the two vehicles become entangled. With what initial speed will the entangled mass move off, and is the collision elastic or in elastic? (K:1) SPEED TYPE OF COLLISION A. 9.4 m/s Flastic B. 9.4 m/s Inclastic C. 15 m/s Elastic D. 15 m/s Inclastic Select one: O C D QA B O

Two particles with different initial momentum collide and stick to each other. Compared to before the collision, the system of two objects after the collision has? Explain.  A. Less total momentum and less kinetic energy B. Less total momentum but the same amount of total kinetic energy. C. Not enough information is given to decide. D. The same amount of total momentum and the same total kinetic energy. E. The same amount of total momentum, but less total kinetic energy.

What is impulse? choose all that apply.   A. change in momentum   B. change in velocity.   C. Product of force and the time.   D. Product of force and distance.

movement. 12. A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the momentum during the collision are correct? * a. The momentum of the car-truck system is conserved, but the momentum of each one separately is not conserved. b. The momentum of the truck is conserved. c. The momentum of the truck and the car are each conserved. O d. The momentum of the car is conserved. O e. The car and truck must undergo the same change in speed. hp 7. 8

A 5 kg blob of clay is moving forward at 2 m/s when it has an inelastic collision with a 2kg blob of clay initially at rest. What will be the final velocity of the two blobs after they stick together?

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