Physics - December 2006

a ball is thrown up at speed 12m/s and at height h how do i find the time at the maximum height and when it reaches the ground? also information is that after the ball reaches the ground its velocity was -30m/s and the time was 4.4s. Thanks

2006-12-05 16:11:32 · 2 answers · asked by Stephanie 1

The largest mincemeat pie ever created had a mass of 1020 kg. suppose the pie of this mass slides down a ramp that is 18 m long and is inclined to the ground be 10 degrees. if the coefficient of kinetic friction is 0.13, what is the net work done on the pie during it's decent?

2006-12-05 16:11:12 · 3 answers · asked by maggie 1

Find the volume of a sphere with radius r = 0.01 centimeter. Write your answer in scientific notation

Please also show me how to do

2006-12-05 16:02:13 · 3 answers · asked by Stasi 4

why is acceleration of an falling object constant?

2006-12-05 15:57:24 · 6 answers · asked by Stephanie 1

I have asked before about the steam cannon....they claim there 24 pound cannonball traveled one mile...It was I think Episode 44...the angle of the cannon did not make it look like it could travel a whole mile.They had 60 Pounds of pressure..Plus at the very end when they picked up the cannon ball it had a 3" indention in the dirt...Yet Big fat Jamie had no footprints in the place where he picked it up at the very end..My Question is is it possible to travel that far plus why did Jamie Have No indentions in the sand where he picked it up..I think it was dropped there ...Is there something I am missing...There must be a Equasion..to prove it..P.S. I ADMIT I AM A BAD SPELLER...SORRY>>ANY Sane answer..B.E.N.

2006-12-05 15:50:41 · 5 answers · asked by bullsweat007@sbcglobal.net 1

I am stuck on this problem and would be really greatful with any help on it. Thanks a bunch!

A stone is dropped from rest into a welll. The sound of the splash is heard exactly 1.90 s later. Find the depth of the well (in m) if the air temperature is 14.0°C.

2006-12-05 15:34:48 · 4 answers · asked by Anonymous

Analyze the motion of a rock dropped in water in terms of its speed and acceleration. Assume that a resistive force acting on the rock increases as the velocity increases.

2006-12-05 15:25:03 · 1 answers · asked by Hannah 1

Who...
discovered that the buoyant force depends on the weight of the displaced fluid?
Described the connection between fluid speed and pressure
Fill in the blanks...
A swim__________ controls a fish's overall density
_____force is the upward force exerted on any object in a fluid
The layer of gases surrounding the Earth is called the _____
A_____is something that flows.
The amount of matter in a certain volume divided by the volume is _____
A fluid force that opposes motion is called_____
One newton per square meter is a _____
A_____device uses a liquid to transmit pressure from one point to another
An irregular fluid flow is _____
To_____is to move into something else's location by pushing it aside
_____ is the amount of force exerted on a given area divided by the area
The forward force from a plane's engine is _____
Mark ur answers from 1-15 enjoy the game and good luck for the best answer!!!

2006-12-05 15:19:34 · 8 answers · asked by i am what i am 2

2006-12-05 15:00:19 · 4 answers · asked by Anonymous

A rod 7.0 m is pivoted at a point 2.0 m from the left end. A downward force of 50 N acts at the left end, what distance from the pivot can a third force of 300 N acting upward be placed to produce rotational equilibrium? Neglect the weight of the rod.
1.0, 2.0,3.0, or 4.0 ?

2006-12-05 14:55:26 · 2 answers · asked by Kitana 2

Calculate the net torque (magnitude and direction) on the beam in Figure P8.3 about the following axes.
http://www.webassign.net/sercp/p8-3.gif...
figure 8.3 is above

(a) an axis through O, perpendicular to the page
(b) an axis through C, perpendicular to the page

2006-12-05 14:48:07 · 3 answers · asked by Kitana 2

2006-12-05 14:27:20 · 9 answers · asked by AJ01737785 1

2006-12-05 14:06:16 · 7 answers · asked by bearyspecial93 1

since the boiling point goes up under pressure does the freezing go up conversly?

2006-12-05 13:05:36 · 15 answers · asked by jch_85224 1

2006-12-05 12:59:34 · 10 answers · asked by saffa20 1

2006-12-05 12:55:34 · 6 answers · asked by theresa_xo92 2

& hearing the thunder if the lightening flash is 53 km away? The speed of lightwaves in air is 3 x 10^8 m/s & the speed of sound waves in air is 333 m/s. Ans in s.

2006-12-05 12:48:10 · 2 answers · asked by Dee 4

Need to explain to a second grader, How water magnifies naturally when looking through a plastic two liter bottle of water?

2006-12-05 12:42:27 · 3 answers · asked by Michael s 1

the sliding friction coefficient is 0.10.

Part D says: Once moving, what total force must be applied to the sled to accelerate it to 3.0 m/s^2? (By the way, I know for certain that I have parts A, B and C correct).

2006-12-05 12:38:19 · 2 answers · asked by Jen 2

2006-12-05 12:29:16 · 24 answers · asked by Anonymous

will speed always equal distance over time...or is it delta d over delta t?

2006-12-05 12:27:31 · 5 answers · asked by Anonymous

2006-12-05 12:27:18 · 4 answers · asked by Anonymous

it means change in position
what does it mean? i don't get it!

2006-12-05 12:23:30 · 3 answers · asked by Anonymous

if you hold a coin above your head while in a bus that is not moving, the coin will land at your feet when you drop it. where will it land if the bus is moving in a straight line at constant speed? explain.

2006-12-05 12:16:16 · 9 answers · asked by smile 3

A professional skier reaches a speed of 56 m/s on a 30 degree slope. ignoring friction, what was the minimum distance along the slope the skier would have had to travel, starting from rest?
The answer is 320 m, but I need to figure out how to get there.

2006-12-05 11:58:47 · 4 answers · asked by Anonymous

Sample Calculation: Trial 1

Weight= 176 lbs. 1 pound= 2.21 Kg
176/2.21= 79.6 Kg
79.6Kg * 9.81= 781.2 N (Force)

Pet= KeB
Mgh=.5mv^2

79.6 (9.81) (2.87)= .5 (80) v^2
2241.1= 40v^2
2241.1/40= v^2
V^2= 56.02
V= 7.484 m/s

7.484= 0 + A(14.8)
14.8A= 7.484
A= 0.51 m/s
Vf^2= Vi^2 + 2ad
7.484^2= 0+2(0.51)D
56.01= 1.02d
D= 54.9 m

W= F * D
W= 781.2 * 54.9
W= 42,887.88 J
W= 42.8 KJ
Power= work/t
Power= 42887.88 J/ 14.8s
Power= 2897 W

when i try to check my answers using P=F*V P= 781.2 * 7.484 i dont get 2897, i get 5000

2006-12-05 11:56:13 · 3 answers · asked by socom_lover 2

Identical rockets A and B are 1 mile apart, tethered by a taut slender steel cable in outer space. A green light signal arriving from a distance perpendicular to the cable says "go!", and both rockets accelerate at identical rates. The rockets A and B and cable soon approach a fraction of the speed of light. Does the cable break, or not? Explain your reasoning.

2006-12-05 11:37:11 · 3 answers · asked by Scythian1950 7

A) calculate the acceleration if you push with a 20-N horizontal force on a 2-kg block on a horizontal friction-free air table?

B) what acceleration occurs if the friction force is 4N?

please explain the concept.

2006-12-05 11:16:15 · 8 answers · asked by smile 3

calculate the horizontal force that must be applied to produce an acceleration of 1.8 g for a 1.2-kg puck on a horizontal friction-free air table.

2006-12-05 11:12:20 · 6 answers · asked by smile 3

calculate the horizontal force that must be applied to a 1-kg puck to make it accelerate on a horizontal friction-free air table with the same accelerate it would have if it were dropped and fell freely?

2006-12-05 11:09:35 · 7 answers · asked by smile 3