If a roller-coaster train traveling at 50 km/h collides with the stopping device with a force of 55 N, the device will exert which force on the roller-coaster train?

55N

Explanation:

From the 3rd Law of motion which states that for every action, there is always an equal but an opposite reaction.

This implies that the magnitude of the force exerted by the roller-coaster on the stopping device equivalent to the force exerted back on the roller-coaster by the stopping device. Which is exactly 55newton.

answer: do you mean conversation?

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explanation: we should