#1
Hey everybody, if you like physics, or just wanna refresh yourself, I'm making this thread for you. I'll post problems every once in a while, and you Answer, I'll tell you if it's correct or not. This is all coming from a set of old problems I had when I was in physics. Just thought I'd make a little something to keep people not bored, even if it does mean doing physics problems Oh, and use 5 significant figures, you gotta be precise!


The first set of problems:

1. A stone falls from rest from the top of a cliff.
A second stone is thrown downward from the
same height 3.6 s later with an initial speed of
70.56 m/s. They hit the ground at the same
time. How long does it take the first stone to hit
the ground? The acceleration of gravity is
9.8 m/s^2. Answer in units of s.

2. How high is the cliff? ^
Answer in units of m.

3. During a baseball game, a batter hits a high
pop-up. If the ball remains in the air for 5.69 s, how
high does it rise? The acceleration of gravity
is 9.8 m/s^2. Answer in units of m.

4. A parachutist descending at a speed of 10.4
m/s loses a shoe at an altitude of 57.5 m.
What is the velocity of the shoe just before
it hits the ground? The acceleration of gravity
is 9.81 m/s^2. Answer in units of m/s.

5. When does the shoe reach the ground? ^
Answer in units of s.

6. A man drops a stone into a water well on
his farm. He hears the sound of the splash
3.55 s later. How deep is the well? The acceleration of
gravity is 9.8 m/s2 and the speed of sound in
air is 325 m/s. Answer in units of m.

7. A toy rocket, launched from the ground, rises
vertically with an acceleration of 38 m/s^2 for
11 s until its motor stops.
Disregarding any air resistance, what maximum height above the ground will the rocket achieve? The acceleration of gravity is 9.8 m/s^2.
Answer in units of km.
Quote by Meths
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Just kidding. You're a fucking retard.



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You want to strap a bunch of used mattresses to the walls?

Why not just roll around naked in medical waste while you're at it?

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medical waste isn't free on craigslist
#2
I am quite sure someone will tell you to post this in the Math/Physics thread.
The content of this signature is pretty much irrelevant
#3
I'd try and work them out if I could be bothered to dig out my calculator.

S U V A T for all of them, if I'm not mistaken.

You are standing in an open field west of a white house, with a boarded front door.
There is a small mailbox here.



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#4
Quote by rock.freak667
I am quite sure someone will tell you to post this in the Math/Physics thread.



This is a whole problem solving thread though. not for questions. This is like a game.
Quote by Meths
I respect and value your opinion.

Just kidding. You're a fucking retard.



Quote by Pr0gNut
You want to strap a bunch of used mattresses to the walls?

Why not just roll around naked in medical waste while you're at it?

Quote by the_perdestrian
medical waste isn't free on craigslist
#5
School just started, and I've only had Physics for two days, and I already dislike it.

*avoids thread like the plague*
#6
My physics class consists of me drawing on my folder the entire period. Physics sucks.
Quote by MakinLattes
dwelling on past mishaps is for the weak. you must stride into the future, unabashed and prepared to fuck up yet again.
#7
Quote by magnus_maximus
Physics is brilliant and I won't here a word said against it...

Or...typed against it.

PHILLISTINES.

English is also brilliant.

>.>
#8
Back on topic....
Quote by Meths
I respect and value your opinion.

Just kidding. You're a fucking retard.



Quote by Pr0gNut
You want to strap a bunch of used mattresses to the walls?

Why not just roll around naked in medical waste while you're at it?

Quote by the_perdestrian
medical waste isn't free on craigslist
#9
I need the equations. I haven't taken dynamics since my junior year of college.
#10
Quote by Korosu
I need the equations. I haven't taken dynamics since my junior year of college.

v=dr/dt
a=dv/dt
That's the answer to all of life's questions, use them wisely.
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The truth is, Muslims never apologized for their faith having something to do with the attacks on 9/11.
#11
Quote by damian_91
v=dr/dt
a=dv/dt
That's the answer to all of life's questions, use them wisely.

I'm too lazy to derive further.
#13
All the questions seem like they're part of the same unit. The TS' name has 92, so he's probably around the age where he'd start taking this stuff in HS / early first year uni. Definitely couldn't be a "Solve my homework" thread in disguise!
#14
This is my old homework guys, I took physics junior year, last year :P
Quote by Meths
I respect and value your opinion.

Just kidding. You're a fucking retard.



Quote by Pr0gNut
You want to strap a bunch of used mattresses to the walls?

Why not just roll around naked in medical waste while you're at it?

Quote by the_perdestrian
medical waste isn't free on craigslist
#15
Fuck this. I hated physics. I dropped it after 2 weeks my junior year in high school because my teacher sucked at teaching it. I'm pretty good at math... but I prefer it when a teacher would explain it right the first time, instead of giving us a brief explanation, then everyone getting confused and all going up to her desk for one-on-one. I refuse.

Now... for my senior year I had Trig and Adv Algebra. Aced both classes.

Sorry
/physicsrant.