– Good morning. Did you know that velocity measurements depend on the frame of reference from which they are taken? – Hey guys?
– Hey Bo. – Hi Bo. ^♫ Flipping Physics ♫ – In other words, the motion of the person taking the measurements will affect the interpretation of the motion of the object being observed. – Uh what? – (chuckling) All right, I’ll try again. Let’s try showing a classic example. A guy riding a skateboard tosses a ball up in the air. From the perspective, or frame of reference, of a stationary bystander, the ball appears to follow a parabolic curve. However, from the perspective, or frame of reference, of the guy moving on the skateboard, the ball appears to move straight up and down. In other words, two observers, moving with respect to one another,
will usually disagree on the description of the motion of an object. To put it one more way, all motion is relative to the observer’s view point, or what we call the observer’s frame of reference. Thank you very much for learning with me today, I enjoyed learning with you. – Can we please see those again? – Uh yeah, please? – Sure, I’ll add another example, dropping a ball from a moving car. And I’ll add some music. (acoustic guitar music) ♫ Until I see ♫ The daylight in your arms ♫ And you’re starting fires in my home ♫ The daylight in your arms ♫ And you starting fires in my home – I didn’t get to say anything in this video. ♫ Until I see ♫ The daylight in your arms