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Who Is Good At Physics?

98silvz71

By 98silvz71
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98silvz71 Enthusiast

98silvz71

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I have a few questions that I do not know how to do because when I go to put the answer in it says its wrong. Can anyone help me?!

 

Q1: A woman rides on a Ferris wheel of radius 16 \rm m that maintains the same speed throughout its motion. To better understand physics, she takes along a digital bathroom scale (with memory) and sits on it. When she gets off the ride, she uploads the scale readings to a computer and creates a graph of scale reading versus time. View Figure Note that the graph has a minimum value of 510 \rm N and a maximum value of 666 \rm N .

 

gallery_18066_203_2705.jpg

 

Q2: An old-fashioned vinyl record rotates on a turntable at 59 rpm. What are (a) the angular speed in rad/s and (b) the period of the motion?

 

Q3: To withstand "g-forces" of up to 10 g's, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a "human centrifuge." 10 g's is an acceleration of 98\;{\rm m}/{\rm s}^{2}. If the length of the centrifuge arm is 14 m, at what speed is the rider moving when she experiences 10 g's?

 

Q4: A 1500 kg car takes a 50-m-radius unbanked curve at 15 m/s. What is the size of the friction force on the car?

 

Q5: You're carrying a 3.2-m-long, 21 {\rm kg} pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 {\rm cm} from its tip. How much force must you exert to keep the pole motionless in a horizontal position?

 

Q6: Experiments using "optical tweezers" measure the elasticity of individual DNA molecules. For small enough changes in length, the elasticity has the same form as that of a spring. A DNA molecule is anchored at one end, then a force of 1.5\;{\rm nN} (1.5\times10^{-9}\; {\rm N}) pulls on the other end, causing the molecule to stretch by 5.0\;{\rm nm} (5.0\times10^{-9}\; {\rm m}). What is the spring constant of that DNA molecule?

 

Any or all help is appreciated.

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
Any or all help is appreciated.

The answer is:

 

7 beers, a fat woman, and a kangaroo on a pogo stick.

98silvz71 Enthusiast

98silvz71

Posted
  • Author
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Any or all help is appreciated.

The answer is:

 

7 beers, a fat woman, and a kangaroo on a pogo stick.

 

 

Thats what I said and it actually wrote back DUMBASS. I was pissed! :withstupid:

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
Any or all help is appreciated.

The answer is:

 

7 beers, a fat woman, and a kangaroo on a pogo stick.

 

 

Thats what I said and it actually wrote back DUMBASS. I was pissed! :withstupid:

 

LOL... what can you expect from a Crazy Clown?

98silvz71 Enthusiast

98silvz71

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As I remember, Physics is a pretty intense class.

 

Nah, this is just intro to physics and I'm only havin problems cause he went over the material in about a day.

hubbycap Senior Enthusiast

hubbycap

Posted
Posted
Q3: To withstand "g-forces" of up to 10 g's, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a "human centrifuge." 10 g's is an acceleration of 98\;{\rm m}/{\rm s}^{2}. If the length of the centrifuge arm is 14 m, at what speed is the rider moving when she experiences 10 g's?

 

Isn't that the most precious thing you've ever read.

dlstewart01 Senior Enthusiast

dlstewart01

Posted
Posted

If it takes a man and a half a day and a half to dig a hole and a half, how long will it take a monkey with a wooden leg to kick all the seeds out of a cuecumber???????

 

Don

hubbycap Senior Enthusiast

hubbycap

Posted
Posted
As I remember, Physics is a pretty intense class.

 

Nah, this is just intro to physics and I'm only havin problems cause he went over the material in about a day.

 

 

Cam, I know that you've posed these questions in a serious tone, sorry to make light of it. Question: Yes I know there are a couple of engineer-types (not me) in here, but did you really believe that this crowd would be of much help on this? :withstupid:

98silvz71 Enthusiast

98silvz71

Posted
  • Author
Posted
As I remember, Physics is a pretty intense class.

 

Nah, this is just intro to physics and I'm only havin problems cause he went over the material in about a day.

 

 

Cam, I know that you've posed these questions in a serious tone, sorry to make light of it. Question: Yes I know there are a couple of engineer-types (not me) in here, but did you really believe that this crowd would be of much help on this? :drool:

 

 

These are take home test questions and I was desperate. And thats what I said. But I was hopin that they would show their magic for me. :withstupid:

hubbycap Senior Enthusiast

hubbycap

Posted
Posted
As I remember, Physics is a pretty intense class.

 

Nah, this is just intro to physics and I'm only havin problems cause he went over the material in about a day.

 

 

Cam, I know that you've posed these questions in a serious tone, sorry to make light of it. Question: Yes I know there are a couple of engineer-types (not me) in here, but did you really believe that this crowd would be of much help on this? :drool:

 

 

These are take home test questions and I was desperate. And thats what I said. But I was hopin that they would show their magic for me. :drool:

 

 

 

Man, I'm rootin' for you. :withstupid: C'mon smart guys! I've read a bunch of smart ass answers in here, just today!

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
I've read a bunch of smart ass answers in here, just today!

Fred... I'm shocked that you might think that!

 

If I were Cam, I'd be googling my ass off right now with a beer in hand.

hubbycap Senior Enthusiast

hubbycap

Posted
Posted
I've read a bunch of smart ass answers in here, just today!

Fred... I'm shocked that you might think that!

 

If I were Cam, I'd be googling my ass off right now with a beer in hand.

 

 

 

Or a highball. :withstupid:

carneyman Senior Enthusiast

carneyman

Posted
Posted

Man, if you get answers to this, I'm gonna post some of my take home physics test questions...who here took E & M or thermo?

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