If a locomotive is pulling ten cars and speeding up, on which coupling is the gr

Question

If a locomotive is pulling ten cars and speeding up, on which coupling is the greatest tensile force exerted?

Is this tensile force due to stretching or compression?

If the locomotive is slowing the train down, on which coupling is the greatest tensile force exerted?

Is this tensile force due to stretching or compression?

A. The greatest tensile force is exerted on the first coupling (the one right behind the engine). B. The greatest tensile force is exerted on the last coupling (the one between the ninth and tenth railroad cars).

Is this tensile force due to stretching or compression?

If the locomotive is slowing the train down, on which coupling is the greatest tensile force exerted?

A. The greatest tensile force is exerted on the first coupling (the one right behind the engine). B. The greatest tensile force is exerted on the last coupling (the one between the ninth and tenth railroad cars).

Is this tensile force due to stretching or compression?

Explanation / Answer

1)

answer: A

Reason: larger mass will act at the right behind the engine

2) This tensile force is due to stretching.

3)

answer: A

Reason: larger mass will act just right of the behind the engine.

4) this tensile force is due to compression.

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