Physics - November 2006

A 0.100 kg ball is thrown straight up into the air with an initial speed of 15.0 m/s. Find the momentum of the ball (a) at its maximum height, and (b) halfway up to its maximum height.

2006-11-02 15:24:36 · 5 answers · asked by Anonymous

three particles have identical masses. Each particle experiences only the gravitational forces due to the othertwo particles. How should the particles be arranged so each one experieces a net gravitational force that has the same magnitude? Why?

2006-11-02 15:14:48 · 6 answers · asked by FIGUREsk8er4life 1

In my class, we are curretnling doing work/engery s tuff. I am trying to figure out how to do this problem but I dont' know how. Can someone please give me a STEP by STEP explanation of how to do this? I don't understand how to do it.

http://img228.imageshack.us/img228/4813/untitled1tj3.jpg

2006-11-02 15:02:39 · 3 answers · asked by aftababhan 2

when a body is moved from sea level to the top of a mountain, what changes--- the body's mass, it's weight, or both?Explain

2006-11-02 14:58:01 · 5 answers · asked by FIGUREsk8er4life 1

I'm doing a science experiment where I'm suppose to figure out if more weight increases velocity. My first question is-is velocity the same the same thing as speed? Second question-If the formula for velocity is V=Vo+at how would i measure acceleration and what is initial velocity? EX.-So, if a rolled a skateboard down a hill and it was going 5mph would that be my initial velocity,initial velocity or or acceleration?

2006-11-02 14:37:09 · 5 answers · asked by --->♥<--- 2

can anyone help me do this?
A child on a merry-go-round is moving with a speed of 1.05 m/s when 1.20 m from the center of the merry-go-round.
(a) Calculate the centripetal acceleration of the child.
m/s2 = --Direction-- toward the center away from the center tangent to the circular path
(b) Calculate the net horizontal force exerted on the child (mass = 25.0 kg).
N --Direction-- toward the center away from the center tangent to the circular path

2006-11-02 14:27:29 · 2 answers · asked by tigerlilly 2

2006-11-02 14:18:20 · 4 answers · asked by Scythian1950 7

a girl dangles her watch from a thin piece of string while the jetliner she is in takes off. the string makes an angle of 29° with respect to the vertical while the aircraft accelerates for takeoff, which takes about 18 seconds. Estimate the takeoff speed of the aircraft.
i have some idea of how to begin it, but im kinda not sure! if you can help at all, it would be appreciated!

2006-11-02 14:12:31 · 2 answers · asked by tigerlilly 2

2006-11-02 13:29:28 · 1 answers · asked by wasdocdb 2

at the bottom. The inclined plane makes a 28.8 deg. angle with the horizontal and is l=3.03 m long. The mass of the block is m=2.51 kg.

What is the coefficient of friction between the block and the plane?

2006-11-02 13:24:01 · 5 answers · asked by drdagher89 2

Im not very creative, so i need ideas on what i should useto make my atom model out of!

thanks!
=)

2006-11-02 13:20:52 · 3 answers · asked by kimmiee 1

Which would have a greater focal length and why? a thin or thick diverged lens?

thankyou

2006-11-02 13:19:31 · 1 answers · asked by Anonymous

If one had an understanding of string theory, might it have an effect on an understanding of one's religious or spiritual experience?

Would it be supportive? antagonistic? neutral?

Would it illuminate? clarify? or complicate?

There have always been scientists who are believers (in one religious faith or another). I wonder how they would respond to this issue.

2006-11-02 13:07:55 · 3 answers · asked by bfrank 5

Is there a quantum interpretation of reflection, refraction and absorption ? Are there any theories/papers that explain this ?

2006-11-02 12:59:07 · 1 answers · asked by Raj 1

A friend claims that ceiling fans are better than air conditioning because they cool the air faster than air conditioners do. Could you investigate this through scientific inquiry? Explain..What kind of data would you need to collect to carry out this experiment?

2006-11-02 12:45:49 · 3 answers · asked by ilovebasketball 2

2006-11-02 12:43:51 · 3 answers · asked by ssshhh 3

the earth spins at 1000 miles per hour, so why aren't we dizzy all of the time?

my six year old son has asked me and i have related it to us being in a car. we drive at 70 or so mph and we aren't dizzy. he was fine with the answer but wanted to know exactly why.

2006-11-02 12:37:13 · 23 answers · asked by thom 4

A crate (14 kg) is pulled by a force (parallel to the incline) up a rough incline (25 degrees). The crate has an initial speed of 1.56 m/s. The crate is pulled a distance of 7.99m on the incline by a 150N force.
mu(greek letter)=0.285
The acceleration of gracity is 9.8 m/s^2

a) What is the change in kinetic energy of the crate? Answer in units of J.

b) What is the speed of the crate after it is pulled the 7.99m? Answer in units of m/s.

2006-11-02 12:33:36 · 2 answers · asked by Anonymous

It says Describe how the particles move in all four states of matter

2006-11-02 12:06:58 · 3 answers · asked by Anonymous

A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive. What maximum height will a 301.5 m drive reach if it is launched at an angle of 25 degree to the ground? (Hint: at the top of its flight, the ball's vertical velocity component will be zero.)

Please help me solve this problem with calculations/explainations. Thank you

2006-11-02 11:48:42 · 4 answers · asked by Audrey L 2

2006-11-02 11:41:42 · 2 answers · asked by Anonymous

2006-11-02 11:41:37 · 5 answers · asked by Anonymous

2006-11-02 11:36:24 · 8 answers · asked by Matthyow 2

A box with a 75kg passenger inside is launched straight up into the air by a giant rubber band. After the box has left the rubber band but is still moving upward: Answer those two questions!

2006-11-02 11:27:44 · 3 answers · asked by Anonymous

I am interested in finding a solution usually used by the quiver function in MATLAB. The function uses initial position x and y and takes u and v as velocity components then draw an arrow in the direction of velocity with the magnitude. Suppose I have initial position (4,4) and velocy components are u=3 and v=5 then what formula is used by quiver.

2006-11-02 11:19:34 · 2 answers · asked by Nomee 2

Please search answering, support your answer with a website if possible.

2006-11-02 11:13:21 · 10 answers · asked by Anonymous

2006-11-02 11:12:16 · 4 answers · asked by ♥BABAYy GiRl♥ 1

An object with a mass of 30 kg is on an inclined surface. The Normal force exerted on the object is 250 N.

a) What is the gravitational force?
b) Tangential?
c) Angle of Incline?
d)Acceleration of Object?

2006-11-02 11:06:29 · 5 answers · asked by Tennis2127 2

As what you see is light refected off of something, could you see yourself where you were? Just a thought.

2006-11-02 10:57:33 · 15 answers · asked by azimouth4 2

i need help!!!
if a force (F1) acts upon a block of 5kilograms, in the east direction and another force (F2) acits upon the block but towards the west direction. how much is the acceleration using the f=ma equation.
.................force(F1) = 19 Newtons.....................
force(F2) = 25 Newtons..................
mass of block = 5 kilograms

2006-11-02 10:29:18 · 4 answers · asked by FIGUREsk8er4life 1