Need help giving examples regarding momentum

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Examples for the three situations include: an object at rest with a net force acting on it, such as a stationary car being pushed, which has zero momentum but experiences acceleration. For an object with downward momentum changing direction upwards, consider a ball thrown upwards after reaching its peak, where its velocity transitions from negative to positive. Lastly, an object can have a net force acting on it without energy change in scenarios like a satellite in orbit, where gravitational forces act without altering its total mechanical energy. Understanding these concepts involves applying equations related to momentum and energy. Clear examples help clarify the principles of physics in these contexts.
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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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