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18 July 2007 @ 04:42 pm
Physics Homework  

Here it is :)

KINEMATIC EQUATIONS
                        a.) V = d/t
                        b.) V = vf + vi
                                       2
                        c.) V = vf - vi
                                        t
                        d.) d = [ vf + vi ] t
                                          2
                        e.)  d = vit + ½ at2
HOMEWORK (Due on friday)

      1. Rachel wants to go outside but there is a thunderstorm. She sees the flash of lightning bolt and begins counting the seconds until she hears the clap of thunder 5.0 seconds later. She knows that the speed of sound in air is 340 m/s. How far away is the lightning?
      2. Albert is riding his scooter at a velocity of 80 km/ hr, when he sees an old woman crossing the road 45 m away. He immediately steps hard on the brakes to get the maximum deceleration of 7.5 m/s2. How far will he go before stopping? Will he hit the old woman?
      3. A driver traveling at 70 km/h tries to stop the car and finds that    the brakes have failed. The emergency brake is then pulled and the car comes to a stop in 120 m. Find the car’s deceleration.

 

 
 
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The After Morning: good timescrazy4this_girl on July 18th, 2007 01:26 pm (UTC)
Oooh we're studying the exact same thing! XD
Mireilleohlalaxmireille on July 19th, 2007 10:16 am (UTC)
Really now? Coooool xD
caaamwhore on July 18th, 2007 07:08 pm (UTC)
1 has to be five miles away because that's what I said so. :D
Mireilleohlalaxmireille on July 19th, 2007 10:17 am (UTC)
HAHA. I'll work on it first then get back to you later x)
Mireilleohlalaxmireille on July 20th, 2007 12:32 pm (UTC)
Ok, so you're wrong. It's 1,700 m x)
caaamwhore on July 20th, 2007 06:22 pm (UTC)
See? I was only a little bit off. (:
xx_crystalline on July 18th, 2007 10:34 pm (UTC)
Oh dear. I remember this stuff from school... unfortunately, I decided to shut my brain off after school let out.

I can't do math at all. :(
Mireilleohlalaxmireille on July 19th, 2007 10:20 am (UTC)
You've already taken this up?? Gasp. I'm a senior and this is the first (or is it third? i forget x) time we're doing this.

You must be really smart. Haha!
xx_crystalline on July 19th, 2007 07:04 pm (UTC)
Yeah, I was in advanced math classes and stuff, we started learning this kind of material, but it's not like I've mastered it.

Haha, I'm not that smart. It's all my parents' fault, they've made me have perfect grades since kindergarten. (But I guess it'll pay off once I get to college.)
lethal_stringslethal_strings on July 19th, 2007 11:34 am (UTC)
yay! arigatou, mireille! XD
Mireille: Models F.U.ohlalaxmireille on July 20th, 2007 12:28 pm (UTC)
Np, franobie xDD