Is our house and our cars really spinning like the earth is spinning?

Question

Are the parked cars and houses actually moving and spinning?

Answer 1

Your question has to do largely with relative motion. You can imagine the earth like a basketball spinning on a someone's finger and lets say there is a ladybug crawling on the balls surface as it spins. As the basketball player sees it, both the ball and the ladybug are spinning. From the ladybugs perspective, however, the surface of the ball is stationary like how we see earth in day to day life. The reason our big basketball (earth) stays together is due to the force of gravity so you are thinking the right way when saying things are stationary due to forces. To answer your original question, it's all relative! Think of the parked cars and houses as ladybugs in the example I gave.

Answer 2

Yes, we are all spinning with the Earth.

We can see the effect in that the Sun is changing its position in the sky.

Historically people have had the illusion that it is the Sun that is moving through the sky.

This illusion of us being stationary is caused by all the objects rotating together with us and the Earth,

so that we are not moving in relationship with everything around us (on the Earth).

There are ways to observe that it is in fact us that is rotating, not the Sun.

Examples of that are the so called Coriolis forces, and the Foucault's pendulum;

look up a picture of that pendulum on the web.