Consider a large fish that swim towards and swallows a small fish at rest
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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?
Physics Conservation of Momentum
1 Answer
Gió
Jan 8, 2016
I found
0.17
m
s
Explanation:
We can use conservation of momentum in the
x
direction:
enter image source here
So:
(
5
⋅
1
)
+
(
1
⋅
−
4
)
=
(
5
+
1
)
v
5
−
4
=
6
v
v
=
1
6
=
0.17
m
s
Answer link
Related topic
Conservation of Momentum
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