Explanation:
Let
and 
The sum of the two vectors is


The difference between the two vectors can be written as


Operant conditioning, sometimes called <em>instrumental learning</em>, was first extensively studied by Edward L. Thorndike, who observed the behavior of cats trying to escape from home-made puzzle boxes.
Hope this helps!
D kinetic energy✨
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Answer:
I know for sure that it's either A or B have a great day sorry I don't know which one completely
When a footballer collides with the goal post, the forces at work are the action and reaction forces. The player will exert an action force on the goal post, and then a reaction force from the goal post will stop the player. The reaction force call will cause pain and even injury to the player.