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A student with a mass of 65 kg steps on an improvised raft. He then moves at a speed of 2.0 m/s to cross a flooded street. With what velocity does the raft move assuming it has a mass of 25 kg?​

A student with a mass of 65 kg steps on an improvised raft He then moves at a speed of 20 ms to cross a flooded street With what velocity does the raft move ass class=

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facundo3141592

Answer: 0.2 m/s

Step-by-step explanation:

The student steps on the raft, and then he moves (with the raft) at a speed of 2.0m/s to cross the flooded street.

Then the raft moves with him, at the same speed (notice that the mass of the raft does not matter, suppose that you move at 100km/h in a small car, the speed of the vehicle would be exactly the same as if you where in a truck moving at 100km/h)

Then the speed of the raft is also 2.0 m/s.

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