An archer shoots an arrow into a target using a bow. If the "action" force is the force of the bowstring against the arrow, what is the "reaction force? a. the arrow's push against the bowstring
b. weight of the arrow
c. the archer's hand gripping the bowstring
d. the bowstring's force on the bow

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?