Tom pushes two identical blocks on a horizontal frictionless table from the left
ID: 1281055 • Letter: T
Question
Tom pushes two identical blocks on a horizontal frictionless table from the left. The force that block 1 exerts on block 2 is F12. The force that block 2 exerts on block 1 is F21.
(1) Compare the magnitude of F12 and F21.
(A) F12 < F21
(B) F12 > F21
(C) F12 = F21
(D) Cannot be determined
(2) Compare the magnitude of F12 and FLeft.
(A) F12 > FLeft
(B) F12 < FLeft
(C) F12 = FLeft
(D) Cannot be determined
Tom pushes two identical blocks on a horizontal frictionless table from the left. The force that block 1 exerts on block 2 is F12. The force that block 2 exerts on block 1 is F21. (1) Compare the magnitude of F12 and F21. (2) Compare the magnitude of F12 and FLeft.Explanation / Answer
(C)F12 = F21 (Since the two blocks are identical)
(B) F12 < FLeft (Since F12=F21=Fm = F*m/(m+m) = F/2 )