A 5-kg fish swimming I m/s swallows an absent-minded 1-kg fish at rest. What is the speed of the large fish immediately after lunch? What would its speed be if the small fish were swimming toward it at 4 m/s?
To Calculate: The speed of the bigger fish in both cases.
Explanation of Solution
Given info:
Mass of the bigger fish,
Mass of smaller fish,
(i)
Initial velocity of bigger fish,
Initial velocity of smaller fish,
(ii)
Initial velocity of smaller fish,
Formula used:
According to law of conservation of momentum,
Initial momentum = final momentum
Calculation:
(i) Substitute the values:
(ii)
Conclusion
Thus, the speed in the first case is
Chapter 8 Solutions
Conceptual Physics: The High School Physics Program
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