A tractor T is pulling two trailers, M1 and M2, with a constant acceleration. T has a mass of 200 kg, M1 has a mass of 100 kg, and M2 has a mass of 150 kg. If the forward acceleration is 0.60 m/s2, and air resistance is negligible, then the horizontal force on M2 due to the attachment to M1 is
A) 270 N backward.
B) 270 N forward.
C) 150 N backward.
D) 150 N forward.
E) 90 N forward.
Correct Answer:
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