The standard coupling between railroad cars must be capable of withstanding the

ID: 1358851 • Letter: T

Question

The standard coupling between railroad cars must be capable of withstanding the maximum tensile force exerted on any coupling in a given trail.

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

b)The greatest tensile force is exerted on the first coupling (the one right behind the engine).

Is this tensile force due to stretching or compression?

a)streching

b)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 last coupling (the one between the ninth and tenth railroad cars).

b)The greatest tensile force is exerted on the first coupling (the one right behind the engine).

Is this tensile force due to stretching or compression?

a)streching

b)compression

a) The greatest tensile force is exerted on the last coupling (the one between the ninth and tenth railroad cars).

b)The greatest tensile force is exerted on the first coupling (the one right behind the engine).

Is this tensile force due to stretching or compression?

a)streching

b)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 last coupling (the one between the ninth and tenth railroad cars).

b)The greatest tensile force is exerted on the first coupling (the one right behind the engine).

Is this tensile force due to stretching or compression?

a)streching

b)compression

Here , as the locomotive is speeding up

the greatest force will act on the coupling loading maximum weight

b)The greatest tensile force is exerted on the first coupling

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as the engine pulls the cars

this is a streching force

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for slowing down also ,

b)The greatest tensile force is exerted on the first coupling

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as the cars push the engine

this tensile force is compression

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