Physics - December 2006

An automobile with passengers has weight 16000 N and is moving at 114 km/h when the driver brakes, sliding to a stop. The frictional force on the wheels from the road has a magnitude of 8230 N. Find the stopping distance.

2006-12-20 10:57:22 · 2 answers · asked by hydrantman001 1

I really need help in this subject. Everyone says it is easy...but I just don't understand it. I have a few questions that I feel cover the areas where I am lost. Please explain the questions and how to find the answers. Also if you would like, please solve them.

1. A compact car and a trailer truck are both traveling at the same velocity. Did the car engine or the truck engine do more work in accelerating its wehicle?

2. A 10.0-kg test rocket is fired vertically from Cape Canaveral. Its feul gives it a kinetic energy of 1960 J by the time the rocket engine burns all of the feul. What additional height will the rocket rise?

3. Pam, wearing a rocket pack, stands on frictionless ice. She has a mass of 45 kg. The rocket supplies a constant force for 22.0 m, and Pam acquires a speed of 62.0 m/s. What is the magnitude of the force? What is Pam's final kinetic energy?

2006-12-20 10:49:14 · 1 answers · asked by Anonymous

1) blood is pumped out of the heart via thick walled(2mm) tube known as the aorta(inside diametere about 18mm) at an average speed for adult at rest, of 0.33m/s.
a)compute the discharge rate
b)the aorta branches into about 32 majotr arteries that are each roughly the same size-namely- 4mm inside diametere. detrmine the speed of blood through these arteries.(HInt:- it is diffrent thn if there were just one!)

2) a uniform solid cube of material 10 cm on each side has a mass of 700 g.
b)if so, how much of its volume will be submerged?

2006-12-20 10:37:56 · 1 answers · asked by Kshitil 1

A Scalar (ex: mass) has a magnitude but not a direction.
A Vector (ex: velocity) has both a magnitude and a direction.
Can you give any examples of quantities that have a direction but not a magnitude? Are these still called vectors or is there another term for them?

2006-12-20 10:27:48 · 3 answers · asked by Jeffrey K 7

A 1.1x10^3 kg Toyota collides into the rear end of a 3.3x10^3 kg Cadillac stopped at a red light. the bumpers lock, the brakes are locked, and the 2 cars skid forward 4.6 m before stopping. The coefficient of friction between the tires and the road is .50 What was the speed of the Toyota at impact?

2006-12-20 10:18:37 · 1 answers · asked by bandgeek20042007 1

I have always been interested in the force of energy within magnets, along with alternative sources of energy. Well I surfed into this addy below. I found the information on free energy to be logical (with little knowledge of electricity). Also the amount of power produced from the size of the unit is hard for me to comprehend. Please view this link and, please reply. I'm interested in supplying my area with energy for less then 1/2 the cost.
Thanks

http://www.befreetech.com/

2006-12-20 10:14:45 · 6 answers · asked by done 3

wt will be the acceleration of a skydiver when air resistance is one fourth the weight of the skydiver?

2006-12-20 10:13:27 · 1 answers · asked by em. 1

2006-12-20 10:12:50 · 6 answers · asked by krish s 1

1)when the bulb of mercury in glass thermometere is inserted in boiling water the mercury column 1st droop slightly before it begins slightly before it begins to rise.account for this phenomeon..(consider wht happen intialy to the glass)

2)to help lower the high temprature of a sick patient an alcohol rub is sometime used. isopropyl alcohol is rubbed over the patient's back ,arms, legs etc. and allowed to evaporate. why does the work produce?

2006-12-20 10:10:56 · 4 answers · asked by krish s 1

2006-12-20 09:54:46 · 5 answers · asked by em. 1

Stars are light years away

2006-12-20 09:48:31 · 3 answers · asked by Anonymous

2006-12-20 09:37:02 · 9 answers · asked by quark soup 2

2006-12-20 09:26:53 · 7 answers · asked by khushi s 1

since galaxies are moving away its as if there were a cosmic explosion similar to that of our solar system except on a much greater scale. now befrot he universe was formed by this possible comsic explosion what was there, anit matter?and time had to have started someone because you cant have negative time so when did universe time actually start what was it like befor anything was formed just infinte light or dark? its so complex never ending and confusing help me

2006-12-20 09:26:49 · 5 answers · asked by Anonymous

If you wouldn't mind being asked questions about your career and your career has to do with physics then please answer this question or email me mr_psdifficult@yahoo.com. Thanks.

2006-12-20 09:22:20 · 1 answers · asked by psdifficult 1

2006-12-20 09:14:03 · 7 answers · asked by SouthOckendon 5

try to include all the input variables and out put variables and terminal velocity, the floor is tiled and indoors

2006-12-20 09:03:51 · 1 answers · asked by Anonymous

I did a lab on Simple Harmonic Motion using a pendulum. I found that the length alters the period of a pendulum. In the lab, we took a pendulum and changed the amplitude, added mass, and changed the length.

I'm having a lot of trouble thinking of SOEs (sources of error). Anyone have any ideas or can lead me in the right path? I'm really bad at Physics, so I'm still trying to figure this out. Thanks!

2006-12-20 08:59:16 · 5 answers · asked by Skye R 2

try to include all the input variables and out put variables and terminal velocity

2006-12-20 08:32:06 · 3 answers · asked by Anonymous

What transpires between the two states. Assuming nothing is instantaneous, it would seem there should be some gradual change between evergy and light, much like ice to vapor...? Or is there instantaneity?

2006-12-20 07:49:43 · 5 answers · asked by david37863 2

2006-12-20 07:21:22 · 4 answers · asked by shafali v 1

erm...thats it really

2006-12-20 07:12:24 · 12 answers · asked by ........ 3

We are assuming the speed of light is 186,000 miles per second approx and we are driving a really fast car...

2006-12-20 07:09:10 · 17 answers · asked by tony600f 1

If you're going down a hill on a bicycle, and at the bottom is a stand-still body of water, with a board mostly in the water, and you hit the board and you're FRONT WHEEL ONLY locks, will you're bike flie over the board with you're front wheel still connected to the board?
My dad says no.

2006-12-20 07:06:52 · 6 answers · asked by Anonymous

When I leave my lighter outside in the cold, it is hard to light and the flame runs low. But when I keep it inside where it is warm, it fires right up.

2006-12-20 06:25:26 · 4 answers · asked by Anonymous

A geometric point is defined as having no dimensions. It seems to me that two spheres, if they are perfectly hard, so they cannot bend at all, and they are perfectly round, would only be able to touch on a "point." And a "point" has no dimesions.

2006-12-20 06:19:23 · 10 answers · asked by jkc19452004 2

When a bird sits on a telephone wire it doesn't get electrocuted. My understanding of this is that it is not earthed and so provides greater resistance than the wire. The electricity just goes down the wire. But what is confusing me is.. how does the electricity 'know'? Surely it has to jump into the bird to find it doesn't lead to earth? In which case the bird would be electrocuted. How does the resistance at the point of contact with the wire change if the bird is earthed?

2006-12-20 06:14:38 · 21 answers · asked by cheetara_2001 2

An alpha particle, m=4 (in atomic units), collides elastically with a calcium atom, M=20, at rest. The initial velocity of the alpha particle is Vî m/s. After collision the alpha particle has a velocity of 10î - 5j m/s. If the velocity of the calcium atom after collision is Vx î + Vyj find all the unknowns in the problem.

2006-12-20 05:45:35 · 1 answers · asked by Pam 1

A passenger in a train that moves horizontally looks outside and sees a child hitting a ball straight up to a height of 30 m.The child's coach clains that the ball left the child and a angle of 15 degree above the horizon. Find the speed of the train relative to the ground.

2006-12-20 05:43:51 · 3 answers · asked by Pam 1

2006-12-20 05:09:25 · 38 answers · asked by JOHN Y 2