Answer: The pressure from the air and force of who or what used effort to make it move. For example you roll a ball it doesn't stop unless it runs out of the force which in this case would be energy.
Explanation:
Knowledge
Answer: Sure!!!
Answer:
no:
it would grow and no longer be able to fit through the loop due to the hot air expanding.
A car
A car can travel 100 m in 5 seconds
Hope this helps!