Question

A 5-kg fish swimming at a velocity of 1 m/s swallows an absent-minded 1-kg fish swimming towards it 4 m/s. Wha tis the speed of the larger fish after lunch?

Answer 1

I found `0.17m/s`

Explanation:

We can use conservation of momentum in the `x` direction:

So:
`(5*1)+(1*-4)=(5+1)v`
`5-4=6v`
`v=1/6=0.17m/s`