Question

18. 80 railway wagons all of the same mass are pulled by an engine with a force of 4 x 10^5N. The tension in the
coupling between the 30th and 31st wagon from the engine is ​

Answer 1

The mass of each wagon = 5 * 10 ^ 3 kg

Force applied on the engine = 4 * 10 ^ 5 N

The total mass of the 80 wagons = 80 * 5 * 10 ^ 3 kg

= 4 * 10 ^ 5 kg or 40 * 10 ^ 4

This will convert the tension in the 1N.

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