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Standard XII

Physics

Normal Reaction

Three cars ea...

Question

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:

F

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F / 2

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F / 3

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2 F / 3

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Solution

The correct option is C $F / 3$
The whole train experiences some acceleration $A,$
So $,$ $$F=3mA.
Each car $,$ of mass $m$ experiences the same acceleration $,$
So $,$ $F_{c a r} = m A = \frac{1}{3} \times F = \frac{F}{3}$
Hence,
option $(C)$ is correct answer.

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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:

The correct option is C F/3The whole train experiences some acceleration A,So, $$F=3mA.Each car, of mass m experiences the same acceleration,So, Fcar=mA=13×F=F3Hence,option (C) is correct answer.

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:

The correct option is C $F / 3$
The whole train experiences some acceleration $A,$
So $,$ $$F=3mA.
Each car $,$ of mass $m$ experiences the same acceleration $,$
So $,$ $F_{c a r} = m A = \frac{1}{3} \times F = \frac{F}{3}$
Hence,
option $(C)$ is correct answer.