Three cars each of mass m are being pulled by an engine exerting a force F on the lead car. The force exerted on the trailing car by the middle one is:
A
F
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B
F/2
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C
F/3
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D
2F/3
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Solution
The correct option is CF/3 The whole train experiences some acceleration A,
So, $$F=3mA.
Each car, of mass m experiences the same acceleration,