Physics - August 2006

A physics professor did daredevil stunts in his spare time. His last stunt was an attepmt to jump accross a river on a motorcycle. The takeoff ramp was inclined at 53 degrees, the river was 4 meters wide, and the far bank was 15 meters lower than the top of the ramp. The river itself was 100 meters below the ramp. Ignore air resistance.
a.) What should his speed have been at the top of the ramp to have just made it to the edge of the far bank?
b.) If his speed was only half the value found in (a), where did he land?

2006-08-07 01:04:19 · 4 answers · asked by just_askin' 1

2006-08-07 01:01:26 · 21 answers · asked by Anonymous

Because we are in the 3rd dimension, and are on the 3rd planet away from the sun?

Plus, there are said to be 9 dimensions, and there are 9 planets?

Is this just coincidence?

Thanks! ;-)

2006-08-07 00:28:08 · 5 answers · asked by Anonymous

In additon to this question, why should the direction depend on the altitude in this way?

2006-08-07 00:19:12 · 4 answers · asked by Jorgia M. 1

...soft contact lenses are made up of?
No links please.

2006-08-07 00:10:31 · 5 answers · asked by type-R 2

At least that's what I heard... that light doesn't have mass.

2006-08-06 23:50:42 · 12 answers · asked by Sleepless Bookworm 2

2006-08-06 22:54:30 · 7 answers · asked by Divya 2

What is the reason for a smell delay of the gas?

2006-08-06 22:40:11 · 11 answers · asked by Jorgia M. 1

2006-08-06 20:19:48 · 21 answers · asked by ilovemyindependence 1

Notwithstanding the fact that the number of eletrons and protons in each atom is equal leaving no unattended subatomic particle. That is, each atom has a balanced structure than why does the need arise to fill the outermost electron orbit upto its full capacity. Addition of extra electrons to an atom should also increase the number of protons. There is something that is probably missed by me or remain unexplained to me.

2006-08-06 19:41:48 · 12 answers · asked by bainsal 2

I was wondering what the force was a person uses when that person moves themselves back and forth on a swing set. Like when they kick their feet back and forth, is that like, intertia or something? or.. what is it?

2006-08-06 18:59:05 · 6 answers · asked by Distant 2

2006-08-06 18:36:17 · 15 answers · asked by Anonymous

2006-08-06 17:48:02 · 6 answers · asked by kwhmeter007 1

2006-08-06 17:12:51 · 11 answers · asked by forzaitalia232569 2

Devil Prakash, Do Not Respond To Any Of My Ques. Whether They Are In German Or English. Ok. No One Is Reading Yr Answers.

2006-08-06 17:09:21 · 3 answers · asked by savvy s 2

2006-08-06 17:01:13 · 2 answers · asked by savvy s 2

a motorist in a car travelling with constant linear velocity brakes suddenly on a wet road and the car continues to slide forward in the same direction. by considering the total kenetic energ;y of the wheels of the car before and after it skids and assuming that there is little fric tion between the wheel and ther road. explain whether the velocity of the car should increase when the brakes are applied

2006-08-06 16:40:02 · 5 answers · asked by John B 1

2006-08-06 16:30:31 · 3 answers · asked by Anonymous

I'll think really hard about them for the next 4 hours

2006-08-06 16:15:38 · 9 answers · asked by Anonymous

a rigid body is free to rotate about a fixed axis. can the body; have nonzero angular acceleration even if the angular velocity of the body is (perhaps instantaneously zero? give an example to illustrate your answer

2006-08-06 15:42:19 · 4 answers · asked by John B 1

I studied Physics in Highschool and University but that was a while ago. I tried reading 'The Elegant Universe' a while back and had a hard time with it. So i suppose i need a good intro book. Any suggestions?

2006-08-06 15:28:17 · 5 answers · asked by hoverX 3

you can cook an egg within 65 minutes using radio wave from cell phone. Try this placed a tape recorder next to phones to imitate sounds of speaking so the phones would stay on. Put the egg in the middle.

2006-08-06 15:25:32 · 11 answers · asked by Anonymous

What one discovery or event would prove all or most of modern scientific theory wrong?

What are your thoughts, if such a discovery already exists, and if there is evidence of it .

Thanx

2006-08-06 15:02:45 · 15 answers · asked by Anonymous

it seems logical that it would. with no pressure being pushed down on the body what would stop atoms from spreading out. Just like as you increase pressure they compact.

2006-08-06 14:31:52 · 12 answers · asked by paddy 1

2006-08-06 14:29:43 · 2 answers · asked by domteal 1

i said "if the universe is continuously moving, then wut has potential energy?" she had to ask the principle and he said that something only has potential energy reletive to something else. is this true?

2006-08-06 14:27:04 · 14 answers · asked by imacatholic1 3

Is time travel possible?

2006-08-06 14:09:46 · 23 answers · asked by Anonymous

yes or no
please explane

2006-08-06 13:56:22 · 1 answers · asked by Anonymous

It can be shown that the cross product of two vectors, A = Ax i + Ay j + Az k, and B = Bx i + By j + Bz k is as follows:
A * B = (AyBz - AzBy) i + (AzBx - AxBz) j + (AxBy - AyBx) k

The cross product can then be written as follows, where we use the rules for evaluating a determinant. (Note, however, that this is not actually a determinant, but a memory aid.)

| i j k |
A * B = | Ax Ay Az |
| Bx By Bz |

Assume that A = 7.2 i - 4.3 j and B = -8.5 i + 7.0 j + 2.0 k.

(a) Use the above results to determine the vector product A x B.
i + j + k
(b) Use the above results to determine the angle between A and B.

2006-08-06 12:52:39 · 2 answers · asked by Anonymous

What principle would allow such a device to work?

2006-08-06 12:30:21 · 6 answers · asked by nicemachine 2