Need help giving examples regarding momentum

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SUMMARY

This discussion focuses on three specific scenarios related to momentum and net force. The first scenario involves an object with zero momentum experiencing a net force, indicating that while momentum is zero, acceleration occurs due to the net force. The second scenario describes an object with downward momentum that is changing direction upward, highlighting the role of net force in altering momentum direction. The third scenario discusses an object with a net force acting on it but no energy change, suggesting a deeper examination of the relationship between force, momentum, and energy conservation laws.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concept of momentum and its equation (p = mv)
  • Basic knowledge of energy conservation principles
  • Ability to analyze forces and their effects on motion
NEXT STEPS
  • Study Newton's second law of motion and its implications for momentum
  • Explore the relationship between force, momentum, and direction changes
  • Investigate the law of conservation of energy in relation to net forces
  • Examine real-world examples of momentum changes in various physical systems
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in understanding the principles of momentum and force interactions.

notyourmother
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I need help thinking of examples for these 3 situations:

  1. an object with zero momentum that has a net force on it
  2. an object with downward momentum that is changing in the upward direction
  3. an object has a net force on it but no energy change

Any help would be appreciated!
 
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Welcome to PF;
notyourmother said:
I need help thinking of examples for these 3 situations:

  1. an object with zero momentum that has a net force on it
  2. an object with downward momentum that is changing in the upward direction
  3. an object has a net force on it but no energy change

Any help would be appreciated!

A net force implies acceleration... but certainly a change in momentum.
You have a bunch of equations to do with energy and momentum don't you? Try listing them and see if you notice anything.

Taking them in order - hints:
* you have an equation for momentum: under what circumstances is the momentum zero?
* again from the equation - which part affects the direction? Which part has to change for the change to be in a different direction?
* isn't there a special law to do with energy?
 

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