Motion: Position and Motion

The video explains that while the Earth appears motionless, it spins at over 1,600 km/h. Observing a sunset helps us understand that the Earth is moving, not the sun. The concept of a frame of reference is introduced to explain why we don't feel Earth's motion. Examples, like a moving truck, illustrate how stationary backgrounds help us perceive motion.

How can we observe the effects of the Earth's motion?

In the example of a truck moving, what indicates that the truck is in motion?