Physics - Center of Mass Question with Solution | TestHub
Two bodies have undergone an elastic one-dimensional collision along an axis. Figure is a graph of position versus time for those bodies and for their centre of mass. Assume one body was stationary before collision.
Options:(select one or more)
Answer:
Solution:
Body 1 is stationary before collision, so its - line is horizontal (line 1) and the moving body is line 3 (steep slope). (C) true.
No external force, so the centre of mass moves with constant velocity before and after: one straight line through the collision point. Its slope lies between those of the two bodies.
Line 2 (before) and line 5 (after) are the same straight line: the CM path. (A), (B) true.
After an elastic collision the initially moving body slows (here stops) and is shown by the horizontal line 6. (D) true.
All four are correct: A, B, C, D (official key).
