Can any real collision ever be truly perfectly elastic? Why or why not? (You should think about this in two ways: first consider what effects of the environment surrounding the collision might have on energy and momentum conservation; second, consider the objects themselves – how must an object react to a collision in order to be considered "perfect"?).

Which of the following statements are true about collisions? Two colliding objects will exert equal forces upon each other even if their mass is significantly different. During a collision, an object always encounters an impulse and a change in momentum. During a collision, the impulse which an object experiences is equal to its velocity change. The velocity change of two respective objects involved in a collision will always be equal. While individual objects may change their velocity during a collision, the overall or total velocity of the colliding objects is conserved. In a collision, the two colliding objects could have different acceleration values. In a collision between two objects of identical mass, the acceleration values could be different. Total momentum is always conserved between any two objects involved in a collision. When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force. When a moving…

A car of mass 735 kg traveling at a velocity of 30 m/s in the positive x-direction crashes into the rear of a truck of mass 1,480 kg that is at rest and in neutral at an intersection. If the collision is inelastic and the truck moves forward at 13.5 m/s, what is the velocity of the car after the collision? (Indicate the direction with the sign of your answer. Assume the collision is head-on so that the motion of both vehicles remains entirely along the x-direction) m/s Submit Answer

For the same collision as above, motion sensors record the velocities as a function of time for both carts. The graph of this function for the heavier cart is this: 2 t What qualities can we expect to see for a graph of velocity vs. time coming from the motion sensor recording the lighter cart's motion during the same collision? [Note: In our lab, the motion sensors are looking at their respective carts from opposite directions, so the positive direction for one sensor is the negative direction for the other, but for the purposes of this question, we will assume that the sensors agree upon the positive direction .] O The graph goes no higher than dotted line #2. The graph crosses dotted line #2, but goes no higher than dotted line #1. The graph crosses both dotted lines. There is not enough information to determine whether the graph crosses either dotted line.