If the action force is a player kicking a soccer ball, then what is the reaction force? the ball accelerating in the direction of the kick the ball moving at a constant speed in the direction of the kick the ball accelerating in the opposite direction of the kick the ball pushing on the player in the opposite direction of the kick

Pluto was once classified as a planet. however, scientists no longer classify pluto as a planet. which is a likely reason for this change? the original hypothesis about pluto was supported. no observations of pluto were made in the past. several planets in outer space were found to be similar to pluto. there were significant changes in scientific knowledge about planets.