A locomotive is pulling a number of identical wagons along a level track and accelerating. Friction is negligible. Starting from the last wagon, the ratio of the forces between adjacent wagons is
A) 1:2:3:4 . . .
B) 1:2:4:8 . . .
C) 1:3:5:7 . . .
D) . . .
E) 1:1:1:1 . . .
A
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