aehardin
Nov8-05, 01:49 PM
I have a question regarding forces problem that I don't completely understand...so here it is:
A chain hangs from the ceiling of an evevator with three links as shown:
http://spac.ucdavis.edu/images/rings.jpg
A) Ring A and C each have about twice the mass of ring B. If the elevator is at rest, draw a force diagram for rings A, B, and C. In your drawing, ciricle those forces which are Newton's 3rd Law pairs.
B) Now say the elevator accelerates upward. Would your diagram for B be any different? If no, explain why not. If yes, explain how it would change.
C) If the mass of A is 10kg and the evevator accelerates upward with a=2.0m/sec2, calculate the force of that ring A exerts on B.
I can draw the force diagram in part A, but I'm confused with part B & C. Any help would be appreciated!
A chain hangs from the ceiling of an evevator with three links as shown:
http://spac.ucdavis.edu/images/rings.jpg
A) Ring A and C each have about twice the mass of ring B. If the elevator is at rest, draw a force diagram for rings A, B, and C. In your drawing, ciricle those forces which are Newton's 3rd Law pairs.
B) Now say the elevator accelerates upward. Would your diagram for B be any different? If no, explain why not. If yes, explain how it would change.
C) If the mass of A is 10kg and the evevator accelerates upward with a=2.0m/sec2, calculate the force of that ring A exerts on B.
I can draw the force diagram in part A, but I'm confused with part B & C. Any help would be appreciated!