Speed, Velocity or Acceleration? A train left the station
heading towards Dallas
at 75 miles per hour
north.

Velocity

Explanation:

Speed is how fast something moves.

Velocity is how fast it moves and in what direction it moves in.

Acceleration is the change in how fast it moves. I.e. if it speed up or slows down.

Here we are given the speed of the train (75mph) and the direction (north), therefore it is velocity.

Hope this helped!

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answer:

i havent taken the psat, but i have the sat, make sure to bring some snacks, because youre in there forever, 2 sharp number two pencils, an sat approved calculator, and maybe a jacket.   your phone and any books will be taken up, so don't try to bring them(but they will be given back at the end of the testing).   good luck!   i hope you do well!