Very short questions! Thank you! Two rigid bodies collide. We can solve for the
ID: 1472740 • Letter: V
Question
Very short questions! Thank you!
Two rigid bodies collide. We can solve for the post-impact velocities of the centers of mass of the bodies if we know ( select all that are true): Masses of the bodies and incoming velocities of their centers of mass. Masses of the bodies and incoming velocities of their centers of mass. plus post impact speeds of the centers of mass of the bodies Masses of the bodies and incoming velocities of their centers of mass. plus post impact directions of the centers of mass of the bodies. Masses of the bodies and incoming velocities of their centers of mass. plus post impact velocity of the center of one body. None of the above, further information is required. Select all true statements: The vector sum of the pre-impact momentum of the bodies is equal to the vector sum of the post impact momentum of the bodies. The post impact velocity of the individual bodies is the same regardless of how elastic/plastic the collision is. Kinetic energy is always conserved in a collision. Conservation of momentum can only be applied if there are no forces in any direction applied to the system. Two identical masses travelling in opposite dirctions collide. Select all true statements. If both masses have the same pre- impact speed of both masses is zero. The post impact velocity of each mass is always equal in magnitude. For a completely plastic collision the post impact velocity of both masses is the same For a collision that is not completely plastic, the post impact direction of travel for each mass is always opposite the incoming direction of travel.Explanation / Answer
1.Fourth statement is correct, since post-impact velocity will include speed as well as direction too...
Question 7:
.First statement is correct
Question 8
Three and four statements are correct
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