Question

you are riding on a train that is moving at 120 mph. which of the following statements are true? check all that apply. not moving if the reference point is the train. moving if the reference point is the ground. not moving if the reference point is the train operator who’s also on the train.

Explanation:

• For "Not moving if the reference point is the train": When the reference point is the train (your frame of reference is the train itself), your position relative to the train doesn't change, so you are not moving relative to the train. This is true.
• For "Moving if the reference point is the ground": The train is moving at 120 mph relative to the ground, so you (on the train) are also moving relative to the ground. This is true.
• For "Not moving if the reference point is the train operator who’s also on the train": The train operator is on the same train as you. Your position relative to the train operator (who is in the same moving frame of the train) doesn't change, so you are not moving relative to the train operator. This is true.

Answer:

• Not moving if the reference point is the train.
• Moving if the reference point is the ground.
• Not moving if the reference point is the train operator who’s also on the train.