Electrons may be or other atoms. a. ionized, de-ionized by b. created, destroyed by c. shared by, transferred to d. negatively charged, positively charged by

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement