Random Thoughts

[Gaurav_7]

Ha ha, Tom. :laugh

 

[Dr. Pepper]

lmao

Okay some help with AS Physics please guys...

I need to find out the average speed and the average velocity for one revolution, for circular motion. We know that the radius is 8m, North is upwards, and time taken for one revolution is 5 seconds. I have no idea what to do.

 

[Chewie]

@Mani,

Use the radius to find the circumference. That is the distance travelled in 5 seconds. From there you can find the speed. Wouldn't the velocity be zero though?

I haven't done physics for a while so don't trust me on this

 

[Cricketman]

Use the 'Big Five' but for angular motion

d=vit+.5at^2 is for regular

I think its T(torque)=w(angular velocity)t+.5alpha(angular acc)t^2?

idk, haven't done it in a while. Forgot most of physics tbh, but this doesn't look like a hard problem. looks like a simple plug and chug.

 

[Chewie]

oh angular speed and velocity. If a revolution takes 5 seconds couldn't he just use that?

 

[McLOVIN]

I am backk! I just had the best labor day weekend ever!

ok, 1st of all starting with Saturday. I went to UCB, Berkeley to meet up with my girl.. ok ex girl that I went out with in my senior year. Few other high school friends showed up, who are all in different colleges now, so it was great to be together again. Of course we went to the football game. Cal bears kicked ass. It was like 60-3 or something like that. (shoulda asked Mark to open a vB on that).

Sunday, which was the 2nd day of 3 day labor day holiday T20 tourny, which we play in every year. I missed the 1st day of course, so I didn't get picked on the 2nd. Played on the 3rd and final day, on Monday. I picked up 5 wickets in 2 matches, and scored around 30-40 runs. We came in 3rd. Lost the semi, and won the 3rd place decider.

And that's not even the best part. And the best part is.... we got a Hurst Hemi Dodge Challenger!!!! HOW SICK IS THAT! I slept in it for last 2 days! It's not officially mine yet. But I still get to drive it. I am not used to driving a stick shift. It's awesome. I am not a car person, I was never all that excited about cars. But if you send next to this...

Funny part is, I was happy to get a Chevy Camaro, but THIS!! Chick Magnet all over it!

McLOVIN added 4 Minutes and 12 Seconds later...

btw, that was the last day of Summer. It's already raining! So bah bye to Sun and tan! Look like one of those light Mexicans.

 

[CG123]

I just had a three hours physics exam this morning, and I come on here to see another physics question.

The angular velocity (w) would be (2*pi)/5, which is 1.256 rad per sec.
Then to get the linear velocity, you go that * the radius, so 1.256*8 = 10.05 m/s

I'm not really sure about averages though.

For circular motion, you may mean vertical circles...
To get the velocity at the top, or the minimum speed to clear the top of the circle, you go:
Another way to get the velocity is square root of g (9.81) * r (8) = 8.86 m/s

Sorry I'm not much help, it's hard with out that much context, and we never learnt about averages. Also not sure if you want rotation motion, or vertical circle.

 

[Boomboom1996]

I say hi to all of the planet cricketer here i am new.

 

[Varun]

Well well, I've been researching on the harnessing energy from Piezoelectricity and have an competition tomorrow. We (me and my friend) are aiming to make use of the concept that Piezoelectric slabs can be used in high traffic areas to produce a large amount of energy.
Well, I've read that this concept has been tried in some parts in UK, and some part of US too.
So, if anyone who lives there knows anything more interesting (and helpful) about that, I would appreciate it if you tell me.
I know all the advantages and applications, I just need help about the problems or complications that may arise if the system is well developed.

 

[Dr. Pepper]

Thanks for the help guys. I thought that you needed to find the circumference, then do distance/time. So I got that figured out. But for the velocity I'm still a bit stuck. I have no idea what you're on about with angular velocity and linear velocity, and that equation is completely new to me. I think I'll just go to my teacher for help.

 

[Highlander999]

Bugger me, only got out of work at 8:30pm today and the shop closed at 7:30. The amount of paperwork managers have to do is unreal and I haven't been properly shown it all I have to try and send an email to my area manager tomorrow explaining why my cumulative figures so far this week are 19% down on last year's figures, basically I'm going to be shouted at

 

[pcfan123]

Single again and this time on my own accord .........kinda

 

[Highlander999]

24 hour drinking session at your local bar then, before picking up some random bird on the cards?

 

[pcfan123]

Nah, its a bit of a sad situation really. We really like each other but her being just a few months shy of 30, she wants marriage and kids within the next few years.

Also, she is fairly religious and wants me to be confirmed, I skipped confirmation as a child and I'm not too keen on it, especially raising my kids Catholic. So we decided it would be best to go our separate ways

 

[Highlander999]

Probs best, although weren't you all up for the married life before I left for my month long holiday lol?