Conservation of Momentum in a Fishy Encounter

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In summary, changing momentum can result in a change in an object's velocity and direction of motion, and is caused by forces acting on the object. Momentum is directly related to an object's resistance to change in motion, known as inertia. However, abrupt changes in momentum can have negative effects and should be carefully considered. This is in line with Newton's second law of motion, which states that a force must be applied to an object for a certain amount of time in order to change its momentum.
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Homework Statement



A 5kg fish is swimming at 1m/s swallows an absent minded fish swimming 1kg fish at rest. (a) Show that the speed of the larger fish after lunch is -5m/s. What would be its speed if the smaller fish was traveling toward it at 4m/s

Homework Equations



momentum=mv?

The Attempt at a Solution


I don't know what to do...sorry
 
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You can use conservation of momentum, but first you need to correct your problem statement '..fish swimming 1kg fish at rest..' :confused:
 

FAQ: Conservation of Momentum in a Fishy Encounter

How does changing momentum affect an object's motion?

When an object's momentum changes, it can result in a change in its velocity and direction of motion. This is because momentum is a vector quantity that takes into account both an object's mass and velocity. So, when the momentum changes, either the mass, velocity, or both must change in order to maintain the law of conservation of momentum.

What factors can cause a change in momentum?

A change in momentum can be caused by a force acting on an object for a certain amount of time. The force can either increase or decrease the object's velocity, resulting in a change in its momentum. Other factors that can affect momentum include the mass of the object and the angle at which the force is applied.

How is momentum related to inertia?

Momentum is directly related to inertia, which is an object's resistance to change in motion. This is because an object with more momentum will have a greater resistance to change in its motion, as it would require a greater force to change its velocity. Similarly, an object with less momentum would have less resistance to change in motion.

Can changing momentum have negative effects?

Yes, changing momentum can have negative effects. For example, abrupt or sudden changes in momentum can result in a high amount of force being applied to an object, which can cause damage. This is why it is important to consider the safety and potential consequences when making changes to momentum, especially in situations involving high speeds or heavy objects.

How does Newton's second law of motion relate to changing momentum?

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This means that in order to change an object's momentum, a force must be applied to it for a certain amount of time, as stated in the law. So, changing momentum involves the application of force and the subsequent acceleration of the object.

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