Number of results: 5,057
Without energy we can't do work cuz we can't apply ne force on an object. Gravity, itself a force, when, say, pulls a ball down to the gorund it actually does work. Now for tht force, where does it get the energy from or what type of energy does it have? If u have a book ...
Monday, June 20, 2005 at 10:14am by Mike
physics problem-gun (projectile problem)
A gun shoots bullets that leave the muzzle at 250 m/s. If a bullet is tohit a target 160.8 m away at the level of the muzzle, the gun must be aimedat a point above the target. (Neglect air resistance.) How far above the target is this point if the angle the gun makes is ...
Friday, July 15, 2005 at 2:31am by Marcus Jasp
GPE = MASS X GRAVITY X HEIGHT GRAVITY IS ALWAYS 10 M/S 2 (SQUARED) KE = 1/2 X MASS X SPEED 2 (SQUARED) I am uncertain what your question is. As a matter of interest, the value of 10m/s^2 for the acceleration of gravity is in error, in fact, it is never that value, but is less...
Saturday, July 23, 2005 at 6:48pm by robbie jo
PHYSICS - urgent
assuming there's no friction of, if two balls (one heavier than the other) are held up the same distance from the ground; the heavier ball will have more G.P.E than the lighter one, n when both are dropped, all the G.P.E can only change to K.E, as there's no friction; wot i'm ...
Friday, August 12, 2005 at 5:59am by Shahrukh
speed of rocket
how fast does a rocket need to go to break earth's gravitationl pull The final rocket velocity required to maintain a circular orbit around the Earth may be computed from the following: Vc = sqrt(µ/r) where Vc is the circular orbital velocity in feet per second, µ (...
Thursday, August 25, 2005 at 5:54pm by britt
Fluid Mechanics HELPPPPP!!!!!
Hi, I have a deadLine untill Thursday to find out the solutions to the following Questions. Can Anyone Help me??? please?? 1) A cylinder with Relative Density=0.5 and height=10m is holding vertical with the bottom base touching the surface of water. If we leave the cylinder to...
Monday, August 29, 2005 at 5:27am by Mb
Hey...so writerteach. told me that u guys put the website on a new server and lost info. Well here are my questions again...which I posted before. Thanks for ur help on the previous post. 1. The disposal of used batteries is a problem since they often contain poisonous metals ...
Wednesday, June 14, 2006 at 11:22am by help!
You can treat the spheres as point charges at R >2m separation. If e is the charge on each sphere, for the electrical repulsion to equal the gravitational attraction, G M^2 /R^2 = k Q^2/R^2 GM^2 = k Q^2 G is the Newton gravity constant and k is the Coulomb law constant ...
Wednesday, January 23, 2013 at 11:16am by drwls
What keeps all the planets the big ones and the small ones in orbit in our big solar system? A.The gravity from the sun. B.The gravity from the moon. C.The gravity between all the planets. D.The gravity from the beautiful our earth. What do all the planets orbit around? the ...
Wednesday, April 18, 2007 at 4:50pm by Hot stuff
Physics center of gravity
a uniform bridge span weighs 50000N and is 40m long. An automobile weighing 15000N is parked with its center of gravity located 12m from the right pier. What upward support does the left pier provide?
Friday, November 21, 2008 at 3:54am by Kayla
Left out gravity!
Whoa! I left out gravity Total force = mass * acceleration F - 4049 = m a = 168 N F = 4049+168 = 4217 N power = 4217*2.2 = 9277 Watts
Friday, December 5, 2008 at 4:02pm by Damon
science aka gravity
so anyways my science teacher mr mcfaddengave us this question for homeworkpredict what will happen if 30 pencils taped together and dropped at the same time with a single pencil . i get taht in gravity he is trying to say which one will land first that is my question which 1 ...
Monday, September 14, 2009 at 4:49pm by victoria
Calculate the force of gravity on a spacecraft 6400 km (1 earth radii) above the Earth's surface if its mass is 1600 kg.
Tuesday, November 3, 2009 at 9:09pm by DJ
A hypothetical planet has a radius 3.3 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? (downward)
Tuesday, November 3, 2009 at 9:10pm by Anonymous
force of gravity
Part 1 Fg = m1m2g/d^2 force of gravity = (mass 1)(mass 2)(gravitational constant)/distance^2 Fg =(1170kg)(5.98 x 10^24kg)(g)/(220km + 6.38 x10^6) I don't remember what the exact value for g (gravitational constant) is, but you can probably get that from your text. It might be ...
Wednesday, December 9, 2009 at 6:30pm by Little Miss X
Physics (Center of Gravity)
In a lab in my physics class, we were supposed to find the CG of my physics teacher. My partner and I had him lie flat on a wooden (assumed uniform) board that was resting on top of two PVC pipes at either end. Since the PVC pipes acted as the base of support, and since things...
Monday, May 10, 2010 at 7:08pm by Brittany
Physics & Gravity
The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 51 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m would ...
Friday, September 9, 2011 at 8:06pm by Jimmy
Change in law of gravity ? math
I must admit that I am caught totally unaware of the recent change in the law of gravity. I think drwls did not see the inches unit. I thought it was height = 16t^2 , where height is in feet so 38.5 = 38.5/12 ft = 3.208 ft 3.208 = 16t^2 t = .2005 t = √.2005 = .448 ...
Monday, January 23, 2012 at 11:08am by Reiny
A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1-km What must be the rotation speed (revolutions per day) if an effect equal ...
Saturday, June 16, 2012 at 5:32pm by Mike Joseph
Each shell can be treated as a point-source mass with all of its mass at the center of the spherical shell. The two centers are 0.6 m apart. F = G*410*135/(0.6)^2 You don't need to use the radii of the shells. Look up the universal gravity constant G and do the numbers.
Monday, April 8, 2013 at 11:18pm by drwls