Physics - October 2006

2006-10-27 06:15:49 · 13 answers · asked by Denis B 1

between the rotational kinetic energy about the center of a sphere and the sphere's total kinetic energy in this situation:

The sphere is solid and rolls along a horizontal, smooth surface at a constant linear speed without slipping.

Is it 5/3?

2006-10-27 06:10:48 · 1 answers · asked by Dee 4

What is the min. time in which a person starting at rest can move 3 m on a tile surface if he is wearing shoes w/ friction (k) = .5

(3 sig digs) be very detailed

2006-10-27 06:06:28 · 2 answers · asked by the man 2

2006-10-27 05:42:48 · 1 answers · asked by Lillian J 1

please i need help about the double shear stress.. explaination+ examples.. thanx

2006-10-27 05:38:54 · 2 answers · asked by ratle_snake_47 2

example.. gravity, freefall.. then plz explain... tnx!

2006-10-27 05:14:11 · 4 answers · asked by bobochicha 1

I just dont understand this concept at all..i mean why couldnt the main color of the sky be pink?it would be soo much cuter!

2006-10-27 05:10:41 · 9 answers · asked by crazy_lil_thang709 1

On earth, I'm 5-11

2006-10-27 05:00:51 · 9 answers · asked by Samuel 1

a 74.7 degree inclined plane. The coin starts with an initial angular speed of 56.2 rad/s and rolls in a straight line witout slipping. How far does the coin roll up the inclined plane (in units of m)? Acceleration of gravigy is 9.81 m/s^2.

2006-10-27 04:48:43 · 2 answers · asked by Mariska 2

To be used with a lazer to make holographic images. Cheers

2006-10-27 04:38:52 · 2 answers · asked by schming2005 1

When a gun is fired vertically up into the sky the speed of the bullet will be retarded due to gravity and finally reach zero .Then it will start comming down and increase speed due to gravity.Will it attain the same speed as it shot up?

2006-10-27 04:32:36 · 14 answers · asked by matthewj101 1

Statistically are there are more AUTO-accidents shown to be occuring when it is dark out. I mean people drive to work and well the majority drives at what hours? And so we would want it light, right? If it was not for this SAFETY ISSUE I would NOT be in favor of doing the clock change thing ~ except for this SAFETY reason alone I guess I DO FAVOR THE CLOCK CHANGE. Changing the clock does not change how many hours of light or dark you have in a 24 hour period it just shifts when you have the light or dark hours. There is something "mystical" about how the "DARKNESS CALLS the LIGHT", and when you change the clocks sometimes we miss that.....
BUT HEY ; Safety first Mysticism LATER.
we just have to make some adjustments.

2006-10-27 04:25:10 · 5 answers · asked by Anonymous

1) In an accelerated physics clas, student #1 climbs a ladder and drops a steel ball from the ceiling. Srudent #2, using a stopwathc, times the fall of the ball fro mthe ceiling to the flor with a time of 1.5 s. What is the height of the room?

My answer : x = 0(1.5) + 1.5^2(9.8)/2-----> [11.025 m]

2) A woman is reported to have fallen 44 m from the 17th floor and to have landed on a metal ventilator box, crushing it 46 cm.

a)What is the velocity of the woman before she collids with the box?

b) What is the acceleration or deceleration while in contact with the box?

c) How long did it take her to crush the box?


My answer : (a) Vf^2 = 9.8(2)(44)------>862.4---->[Vf = 29.36 m/s]

(b) ???????
(c) -29.36^2 + 2(a)(46)------> [a = -9.37]
0 = 29.36 + -9.36 (t)------> [3.13 s]

2006-10-27 04:22:15 · 3 answers · asked by Anonymous

2006-10-27 04:06:02 · 10 answers · asked by Anonymous

Pretend its made of pure carbon.

2006-10-27 03:30:58 · 7 answers · asked by Sunny D 1

2006-10-27 03:03:21 · 12 answers · asked by themelon 2

why do we put clocks on and back an hour through the year

2006-10-27 02:54:16 · 21 answers · asked by Anonymous

it is the normal force applied per unit area.
so, if i push on a table,with some force,then surely my pressure has got a definite direction?
it does not follow the laws of vector addition?
plz explain .

2006-10-27 02:12:00 · 14 answers · asked by catty 4

earth and nutural both provide zero pottential.
then why we use such long tramission wire for earth and end point where we want to supply current . at that place if we give earth(connection from earth) and phase.

2006-10-27 01:48:14 · 3 answers · asked by Anonymous

a man stands in the middle of a perfectly smooth ,frictionless lake.he can set himself into motion by throwing things ,but suppose he has nothing to throw ,can he propel himself to the shore of the lake without throwing anything???????????//

2006-10-27 01:40:18 · 10 answers · asked by candy 1

at what point on its path the projectile has a maximum velocity,and at what point does it have a mimnimum velocity.

2006-10-27 01:33:10 · 5 answers · asked by candy 1

why do you fall forward when a moving bus decelerates to a stop and fall backward when it accelerates from the rest.expalain the mechanism,other than the inertia theorem. also refer me to a web for more information

2006-10-27 01:30:46 · 5 answers · asked by candy 1

2006-10-27 00:36:41 · 7 answers · asked by salharbi444 1

What do you think of the clocks going back sun morn? Or do you really not care? Is it a good idea or makes no difference at all?

2006-10-27 00:08:19 · 35 answers · asked by Anonymous

A small box is held in place against a rough wall by someone pushing on it with a force directed upward at 28 degres above the horizontal. the coefficients of static and kinetic friction are .40 and .30 respectively. the box slides down unless the applied force has magnitude 13n. What is the mass of the box?

2006-10-26 23:53:05 · 2 answers · asked by Anonymous

fly and train heading towards each other at the same speed.
think about the movement of both the fly and the train

2006-10-26 23:47:27 · 25 answers · asked by Anonymous

2006-10-26 23:41:09 · 9 answers · asked by td321123 1

Police investigators, examining the scene of an accident involving two cars, measure 72m long skid marks of one of the cars, which nearly came to a stop before colliding. The coefficent of kinetic friction between rubber and the pavement is about .80. estimate the initial speed of that car assuming a level road?

2006-10-26 23:12:38 · 4 answers · asked by Anonymous

A cyclist is coasting at a steady speed of 12m/s but enters a muddy stretch where the effective coefficient of friction is .60. Will the cyclist emerge from the muddy stretch without having to pedal if the mud last for 11m? If so, what will be the speed upon emerging?

2006-10-26 23:09:35 · 4 answers · asked by Anonymous

A.kinetic energy only
B.potential energy only
C.both kinetic energy and potential energy
D.kinetic plus potential energy
E. None of these forms remains constant.

2006-10-26 23:00:20 · 9 answers · asked by ally 2