According to einstein's first postulate about the special theory of relativity, which best explains why a person feels like he or she is sitting still on a train that is moving at a constant speed of 60 miles per hour? the train is moving more slowly than the speed of light. the person is moving at the same speed as the train. the motion of the train and of the person are not relative to each other. the reference frame of the person is inside the

the reference frame of the person is inside the ... train. The person is at rest in her own frame which is the same frame as the train. so she's at rest on the train.

the person is moving at the same speed as the train

True, but not moving within the train

The person is moving at the same speed as the train.

Explanation:

real, smaller and upside-down.   so the answer should be b.

answer; how far out of place which the object finished relative to the starting location;