Question

A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why this occurred?

A) The train ran out of momentum.
B) The opposing force of friction stopped the train.
C) The natural state of the train is not to be in motion.
D) The force of gravity slowed the train until it stopped

Answer 1

A, the train ran out of momentum

Answer 2

B. ) The opposing force of friction stopped the train.

Step-by-step explanation:

Took the test :)