Final answer:
False. If a player is ejected in many sports, substitutes usually serve their penalties or the team plays short-handed.
Step-by-step explanation:
The statement that a player from each team is ejected at the same time and no substitute players will serve their time penalties, and teams will play at full strength, is false. In many team sports, such as hockey or basketball, when a player is ejected, typically a substitute player serves their penalty, or the team plays with fewer players. The concept that the force of gravity balances the forces exerted by the players is unrelated to the rules of sports and more to do with physical laws, which would not cause the teams to 'fall' in the context of a sporting event.