Physics - November 2007

What is the minimum value of (in terms of ) such that the car moves around the loop without falling off at the top (point )?

If the car starts at height = 63.0 and the radius is = 21.0 , compute the speed of the passengers when the car is at point , which is at the end of a horizontal diameter.
Take the free fall acceleration to be = 9.80 .

If the car starts at height = 63.0 and the radius is = 21.0 , compute the radial acceleration of the passengers when the car is at point , which is at the end of a horizontal diameter.
Take the free fall acceleration to be = 9.80 .

If the car starts at height = 63.0 and the radius is = 21.0 , compute the tangential acceleration of the passengers when the car is at point , which is at the end of a horizontal diameter.
Take the free fall acceleration to be = 9.80 .

2007-11-06 07:17:55 · 1 answers · asked by elturi2k@sbcglobal.net 1

a 95.0 kg person stands on a scale in an elevator. what is the apparent weight when the elevator is accelerating upward with an acceleration os 1.80 m/s^2?
I dont want the answer just some direction, i have tried a few different methods and none of them work out.

2007-11-06 07:13:59 · 2 answers · asked by Anonymous

Like, when you play Ocarina of Time, and hit the chickens enough times, they attack you and cause a LOT of damage! I would bnever do such a thing,. but are they physically resistant?

2007-11-06 07:03:26 · 5 answers · asked by Anonymous

A 50 kg kid stands at the rim of a merry-go-round of radius 2.0 m, rotating with an angular speed of 3.00 rad/s.
1) what is the kid's centripetal accel?
2) what is the minimum force between his feet and the floor of the carousel that is required to keep him in the circular path?
3) what minimum coefficient of static friction is required? will the kid stay on the merry-go-round?

2007-11-06 06:52:44 · 1 answers · asked by Captain Whiskerboy Litterbox 3

I mean, i love the legend of Zelda and all, but how hard would that small boy have to swing that tiny sword to kill those octopuses? Could he do it?

2007-11-06 06:50:07 · 19 answers · asked by Anonymous

A dentist's drill starts from rest. after 3.2 seconds of constant angular acceleration, it turns at a rate of 2.51 * 10^4 rev/min.

1) find the drill's angular acceleration.
2) determine the angle (in radians) through which the drill rotates during this period.

2007-11-06 06:43:27 · 1 answers · asked by Captain Whiskerboy Litterbox 3

2007-11-06 06:39:25 · 1 answers · asked by Anonymous

2007-11-06 06:35:59 · 4 answers · asked by Emperor Insania Says Bye! 5

a mchine that changes only the direction of a force has a mechanical advantage of

a. 10
b.5
c.2
d.1

2007-11-06 06:27:54 · 3 answers · asked by Anonymous

What physics will be involved in my ascension into the spirit realm? Will gravity play a role?

Are his noodley appendages exempt from physics?

2007-11-06 06:24:32 · 9 answers · asked by Anonymous

2007-11-06 06:17:52 · 5 answers · asked by I'/\/\AZILLA2 3

a distance of 12 cm into the tree's trunk. What was the force exerted on the bullet in bringing it to rest? If you could show me how you got the answer so I can understand it for a similar problem next time I'd appreciate it. Thanks

2007-11-06 06:14:34 · 2 answers · asked by Anonymous

2007-11-06 05:37:07 · 1 answers · asked by Anonymous

flow of electrons is current,matter consisits of atoms(electrons,protons and neutrons).
if current passes through matter like wire,movement of electrons takes place in matter then,how wire was stable without any decomposition because some of it's electrons flow away?

2007-11-06 05:28:34 · 3 answers · asked by venkatesh r 1

A 0.266-kg block is dropped straight downwards onto a vertical spring. The spring constant of the spring is 60 N/m. The block sticks to the spring and the spring compresses 0.14 m before coming to a momentary halt. What is the speed of the block just before it hits the spring?

2007-11-06 05:21:55 · 4 answers · asked by Bob P 1

mass at end = 100 kg, 25 cm potion from end. what position to make a 75 gram mass put the other in equalibruim? what mass would be at 90 cm to put it in equalibrium?

2007-11-06 05:18:07 · 1 answers · asked by howdy 2

A 60kg person at 25m/s makes a left turn with a 75 m radius and the friction is .600 between her and the seat. will she slide on the seat. and if so what is her friction?

2007-11-06 05:13:40 · 1 answers · asked by howdy 2

Please help me solve this problem
If you can please write step by step
The Problem is:
A 70 kg climber is supported in a chimney by the friction forces exerted on his shoes and back, which are in contact with the vertical walls. The coefficients of static friction between his shoes and the wall and his back and the wall are 0.8 and 0.6 respectively. What is the minimum normal force he must exert? The normal force he exerts is the same for both walls?

Thanks

2007-11-06 05:10:54 · 2 answers · asked by Anonymous

A .42 kg soccer ball approaches a player horizontally with a velocity of 17m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 23m/s. What impulse was delivered to the ball by the player? Answer in units of KG x M/s.

2007-11-06 05:01:38 · 1 answers · asked by lucas_andreika 1

2007-11-06 04:59:00 · 7 answers · asked by hfb1957 1

Hia im haveing some problems with my homework. I need to find out what short and long depth perception are, the cures AND the ray diagrams ! Can anybody help me ???
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

2007-11-06 04:56:42 · 0 answers · asked by sophie l 1

Their confidence is so high that they decide to blow off their final exam reading period, and they go to a fraternity party in a town far away and they had a good time. So good that they don't make it back in time for their final exam. They missed the exam. In a panic, they devise a plan. They agree to tell the professor that they had a flat tire and this prevented their returning in time to take the exam. They pleaded with him, "Let us take the exam, please, this could ruin us, we promise nothing like this will ever happen again." The professor agrees and tells them to return the next morning. The two return the following morning, and the professor gives them their exam, but decides he isn't going to hang around. He has them leave their books and backpacks in the office and sends them to different rooms to take their exams. The test consists of one 5point question some molarities problem, and each answers the question, they turn the page, and the next question is a 95 point question

2007-11-06 04:08:24 · 3 answers · asked by tuazeee 2

Need a type of specific rubber or plastic for this one please, not just rubber in bullets like wood on boats, a really specific type.

2007-11-06 04:00:28 · 1 answers · asked by William S 1

2007-11-06 03:48:46 · 3 answers · asked by bob S 1

while cooking, it does not heat the utensil. It only cooks food.
Without heating the utensil, how is it possible to cook food in the utensil? Without any contacts between the heater and food to be cooked, how does heat radiates?

2007-11-06 02:40:04 · 3 answers · asked by Ramu 1

2007-11-06 02:25:00 · 6 answers · asked by Donna P 1

they say potential difference(voltage) is the force given to accelerate the electrons. so what would be the source of voltage and what form of energy it will be.. please help

2007-11-06 02:02:34 · 3 answers · asked by ussamah 1

I have seen a few different setups with a generator hooked up to a mechanical system like a stationary bike or a bike in a rack, etc. Whether the bike tire is pressed against the generator or a large flywheel was used the power output was limited to about 150 – 200 WATTS.

Taken the human component out of the equation, (I know that we have a biological limit as to how much horsepower we can transfer into the front end of the system), what limits the power output?

Increasing the RPM of the generator will increase the power output so why can’t the pedal system be geared up for higher RPM at the generator? (Were assuming that the generator has the capacity to generate more power than currently achieved).

There must be a logical reason that I just am not grasping at the moment otherwise someone would have already built this higher power pedal system.

The only thing I could think of is this is an issue of torque.

Having read many of the answers to dynamo questions I know there are some really helpful smart people out there and quite a few funny smart-alecs. Thank you to everyone who responds whether they are the former or the later.

Now for some coffee.

2007-11-06 00:57:30 · 1 answers · asked by caffine jag 4

An elevator cable breaks when a 795 kg elevator is 26.3 m above the top of a huge spring (k = 8.00 104 N/m) at the bottom of the shaft.

(a) Calculate the work done by gravity on the elevator before it hits the spring.

(b) Calculate the speed of the elevator just before striking the spring.

(c) Calculate the amount the spring compresses (note that here work is done by both the spring and gravity).

2007-11-06 00:52:16 · 2 answers · asked by Anonymous

Where did rock come from in the universe? And also ice because to make a planet lots of dust,rock and gas must collect together but if in the beginning there was nothingness, where did rock,dust and gas appear from it didnt just "happen"

My personal opinion is that we were created by someone or something but they dont know we exist because we are so small and insignificant, like inside of an atom or a higgs bosons particle.......but that then leads to another question where did they come from? (the "people" who made us)

2007-11-06 00:44:06 · 7 answers · asked by Anonymous