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Their average speed is the harmonic mean of 30 and 45 while their average velocity is zero.

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Their average speed is greater than their average velocity

Q: Jake and Brenda drove at a speed of 30 mph for 1 hour. Then they turned around and drove 45 mph until they were back where they started. What is true about their average speed and average velocity?

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His velocity was zero - since he's back to where he started. (Try to substitute speed where appropriate.)

His velocity was zero - since he's back to where he started. (Try to substitute speed where appropriate.)

No. If you can drive around a ten-mile track in the same time it takes you to drive around a one-mile track, then your angular velocity is the same in both cases. But in order to do that, you'll need much higher tangential velocity during the longer run. Tangential velocity is what you'd normally call your 'speed' as you blaze around the track.

sure.

Anyone who moves in any particular direction.Unlike the drunk on his random walk from the pub! He may use speed - if he can get his head around the concept - but velocity is probably a too much of an ask.

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their average speed is greater than their average velocity.

Yes, since velocity is speed and direction its average can be zero. For example say a plane flies from point A to point B at 300 mph and turns around to go from B to A at 300 mph; its average velocity is 0 since it is in the same spot as it started ( the velocity vectors cancel) but its average speed is 300 mph.

His velocity was zero - since he's back to where he started. (Try to substitute speed where appropriate.)

Orbital velocity is the average velocity (or speed) of a planet as it orbits around the sun. It is usually expressed as km/s or mph.

Wind

Every time the unicycle returns to its starting point, the average velocity equals zero. The total displacement divided by the time.

Yes, if, for example, a car races around a circuit, its total displacement is zero and so its velocity, at the end of every lap, is zero.

I attended Sacred Heart around that time. I remember a tiny girl with a big voice who was (I think) named Brenda Lee. I was just wondering if the Atlanta Brenda Lee that I knew is the same as the famous singer, Brenda Lee.

Orbital Velocity is calculated in m/s where as angular velocity is calculated in rad/s.. Answer is very clear.. angular velocity is calculated when body is rotating around a axis and a reference point is needed to calculate it.. where as orbital velocity is calculated when body is moving around a bado in circular path, nt around itself... e.g. Earth rotates around so it have angular velocity .. it also rotates around sun in orbit so it has Orbital velocity also :)