Final answer:
The duration of debate on a main motion can vary depending on the legislative body. In the United States Senate, there is a tradition of unlimited debate on legislation, with a cloture motion required to end the debate. In the House of Representatives, there are time limits set for debates.
Step-by-step explanation:
In the United States Senate, there is a tradition of unlimited debate on legislation. This means that a legislator can delay or prevent a vote on a piece of legislation by insisting that there is still more to debate, a practice commonly referred to as a filibuster. A vote only happens when 60 senators vote in favor of a cloture motion to end the debate.
In contrast, in the House of Representatives, there are time limits for debates. For example, for most bills, the debate is limited to one hour for each side. Sothe duration of debate on a main motion can vary depending on the legislative body. In the Senate, the debate can continue until a motion to table has been offered and voted on, while in the House, there are specific time limits set for debates.