Well, the average speed is the speed you would need to go at if you were going to travel at a constant speed, I think that's the link. Otherwise what would it mean to say it equates to a constant speed... that every time you cover a certain distance in a certain time, you must have been travelling at a constant speed?glassynails wrote:So I had always taken it that distance / time = constant speed (mostly because I never think about these things much anymore), but I believe it actually means "average speed". Am I right?
You're trying to fool glassynails with one of Zeno's paradoxesFJ25 wrote:As you know, if someone set out just after you going twice as fast, they could never catch up with you, because they would first have to get to the point you were at when they started, and by the time they'd got there, you'd have moved on a bit, so they would have to get to that point before they could catch you, but by the time they did, you'd have moved on a bit, so they'd have to get to *that* point before...
Distance divided by time is average speed. But it is a fake out, because to measure "instantaneous speed" you still need a point of reference, i.e., passing some physical location at a certain time. Or using radar you would measure length of time for the radar waves to travel from source to object and back again.glassynails wrote:As I was laying in bed last night trying to fall asleep I got to thinking about the old distance, time and speed equation and pictured myself having to drive 100 miles in a car (not that I do, but just for example). ...
- first question: about 5 minstevel wrote:I always wondered about this one:
At 60 MPH it will take me an hour to drive 60 miles.
If I drive 65 MPH, how much time will it shave off?
Or more importantly, if I've only got 45 minutes to drive that 60 miles, how fast do I need to drive to get there in time?
These are all those math "word problems" that I struggled with in high school.
All I know is 2 8th notes equal a 1/4 note.
Lay off the caffeine after 5 PM. If I have caffeine after 5 PM, I get to thinking... deep thoughts. Like, "Whoa, in The Music Man, Goodnight My Someone and Seventy Six Trombones are the same tune, which means that she's already..."glassynails wrote:As I was laying in bed last night trying to fall asleep I got to thinking...
I just learned a new word - imponderable. Reminds me of that line from that older movie 3 Amigos:Andrew Fryer wrote:No offence, but there's nothing imponderable about it - it's just basic applied maths.
Lol. Post of the day.chiral3 wrote:>Or more importantly, if I've only got 45 minutes to drive that 60 miles, how fast do I need to drive to get there in time?
I'd wait around for 35 minutes daydreaming and then try and go 600mph for 10 minutes. That's kinda how I practice guitar some days.