When it gets hot, rails expand. The gaps in the track allow for it to expand straight, but if there were no gaps, it could expand in unexpected directions, so it could be very dangerous for a train to go over it because they could be bent.
Relative time
seems to fit with this type of question.
Hope i Helped!
I need this answer too , can someone please help , I have a time limit , please
Answer:
0
Explanation:
the momentum will always be 0 when it is at rest because the object isnt moving!
Hope this helped!
