what is the formula for gravity?
347039
F = G*m1*m2/d^2\ninverse square law
812295
Er, gravity really has nothing to do with this question. Fk = coefficient*Fn.  Fn = mg.  -19.6 is your Normal Force.  But yea, the answer is correct.
1034782
The word 'gravity' comes from the Latin word "gravitas", meaning 'weight'.  Gravity is the tendency of objects with mass to accelerate toward each other. Gravitation is one of the four fundamental interactions in nature, the other three being the electromagnetic force, the weak nuclear force, and the strong nuclear force. Gravitation is the weakest of these interactions, but acts over great distances and is always attractive.\n\nCheck these links.
1059217
he value g=9.81 depends on the mass. Think about Newton's second law of motion: Force is equal to mass multiplied by acceleration. Commonly, in college, acceleration can be substituted by gravity in some special cases. So mass depends on gravity.
999791
Measurements. The acceleration of gravity is:\ng = G*m/R^2\nWhere G is the gravitational constant 6.67*10^-11 N*m^2/s^2, m is the mass of the planet, and R is the distance between yourself and the planet. For the surface of the Earth, m and R are approximately:\nMe = 5.97*10^24 kg\nRe = 6.38*10^6 m\nUsing this, you should get about 9.8 m/s^2.
341507
You mean find "g" as if you didn't know the constant? Okay.\n\nPretty simply really. Have the height measured that you're going to drop it from to where it's going to land (this will be your "h"). Make it a high one (one meter is enough). Measure the mass of the object (that's the "w"). Then when you do the experiment, time it. Start it at the instant you let it drop and stop it once it touches where ever it lands. That's enough information to find "g." Just solve for "g" then that would be the answer.\n\nActually, for an experiment, you should solve for "g" as a formula before you start doing anything else. So the formula would be like this:\n\ng = (2h)/[(t^2)(w)]\n\n(t^2 is "t squared")\n\nSo just have that formula then do the experiment: measure height of the drop, the mass of the object, then time it when you drop it (you need good reflexes when you drop it, as it falls fast).\n\nPS Penguins!!!
700115
Very simple, in your case you only need to convert from N(Newton) to Kg(kilogram) so just divide by 9.8 (gravity constant)\n\nN/m2---- /9.8 ---> Kg/m2\nN/m2<-- X9.8 ---- Kg/m2
406596
no idea...but I think you use the formula (Gravitational constant x mass 1 x mass 2) / distance squared
701530
Plug the numbers into the Newtons Equation :\n\nF =  (GMm) / r^2\n\nF = Gravitational Force / weight  \nG = Universal gravitational constant   6.673*10^-11 (note the - sign on the exponent)\nM = mass of earth (kg)                 5.98*10^24 kg\nm = mass of satellite (kg)             150kg\nR = radius of earth    (m)             6,378,137 m\nh = height above earth (m)             12,800,000m\nr   = h+R\n\nThe answer will come out as the weight being @ 162.67N\n\nNot weightless, although someone standing on the satellite would feel weightless as its in continuous free fall.\n\nEver been in an elevator and felt lighter as it falls or been weighless on the big dipper as it plummets?\n\nThe gravitational force (weight) of 162.67N is what keeps it in orbit and prevents it from flying off at a tangent. Basically it pulls the satellite towards the earth but the satellite is travelling so fast it misses and continues round in its orbit.\n\nAdded:\n\nWeight is measured in Newtons and is the attractive force between the two masses. (M & m)\n\nIn this case the earth and the satellite. A 1 Kg mass on the surface of the earth will be pulled towards the earth's centre with a force of 9.8N, therefore its weight at ground level is 9.8N. If you plug take m as 1kg, h as 0 and plug them into Newton's formula should get the answer 9.8N, which is where we get the constant g from. \n\nAs you get further away from the centre of the mass the gravity field decreases in inverse proportion to the distance squared. Hence the divide by r^2 on Newtons fornula. Therefore the weight of a 1Kg mass at 12,800km is 1.08N.\n\nBecause the satellite is in a stable orbit the opposing forces of the satellite trying to escape orbit and the gravitational pull towards the earth are equal so yes the weight is 162.7N and the centrefugal force is 162.7N. This is the correct answer to the problem. \n\nAs an aside; for simplicicities case in this scenario the mass of the satellite can be regarded as constant due to its relatively low velocity compared to the speed of light. \n\nHowever as you come closer to the speed of light mass increases according to Einstein's theory of relativity, eventually reaching infinity at light speed.
139840
The formula for either is P=rho*g*h, where rho is the density of the material (mass per unit volume) and g is acceleration of gravity, and h is the depth of the material at which you are measuring the pressure. \n\nPressure is a force per unit area. If force are unbalanced, then one gets acceleration of something i.e., something moves, by Newton's second law, F=ma.
72553
you find the force of gravity, but there is more force acting on the gymnist, so you must add that force too. the force of gravity is mass times gravity so 72 x 9.8 and the other force is mass times acceleration so thats 72 x .23. then you take these two forces and add them together to get the tension in the rope.
1082685
Simply equate gravity function with centripetal acceleration.\n\nGMe/(r+h)^2 = V^2/(r+h)....where r is earth radius and h is height\n\nsolve for v
285876
OK, Law of universal gravitation can be given as:\n\nF = G(m*n/r^2)\n\nWhere F = gravitational force, G = Gravitational Constant, m = Mass 1, n = Mass 2, r = distance of seperation between centers of gravity.\n\nSo, in your example, m=20kg, n = 120kg, and r = 0.5m. Plug them in and get\nF= G(2400 kg^2)/0.25 m^2\n\nSolving for F, you get F= 9600 (kg/m)^2 * G\nSince G = 6.67300 × 10^-11 m3/kg*s^2\nYou get\n6.40608 x 10^(-7) Kilogram-meters per second squared.
1081934
There are too many formulas to calculate that answer. You have to take in account for example, position of object to find potential energy, mass and the weight due to the gravitational force, also Force that is going to be exerted the object and the amount of that energy that will be lost. SO it is a lot to  find that out. But their is not one formula for it. Sorry, But if you do find out Let me know.
916991
The force of gravity is indeed given by Newton's equation:\n\nF = G*M*m/r²\n\nwhere G is the gfravitational constant, M is the mass of the Earth, m is the mass of the space ship and r is the distance between their centers of mass.\n\nThus, if the space ship is 5 Earth radii above the surface of the planet, then it is 6 Earth radii from the planet's center:\n\nr = (6/5) * (32000 km * 1000 m/km) = 38400000 m\n\nThe mass of the Earth is about 5.9742×10^24 kg. Finally, the value of G, the gravitational constant is about 6.6742x10^-11. Substituting these values into Newton's equation provides:\n\nF = (6.6742x10^-11)(5.9742×10^24 kg)(1500 kg) / (38400000 m\n)²\n\nF = 405.61 N
1171587
Gravity is one of the universal forces of nature. It is an attractive force between all things. The gravitational force between two objects depends on their masses, which is why we can really only see gravity in action when at least one of the objects is very large (like the Earth).\n\nIsaac Newton was the first scientist to define gravity using math. There will be a larger pull due to gravity if the objects' masses are larger and if the objects are closer together.\n\nOne thing we can do with Newton’s law is calculate an escape velocity for the Earth. That is the speed something has to go for it to escape the gravity of Earth. This number for Earth is about 11 km/s. This means that if you could throw a baseball at 11 km/s, it would never come down!
858740
I assume you mean on Earth where the gravitation constant (g) is 9.8 m/s²\nF = mg\n\n300 = 9.8 * m\nm = 300 / 9.8\nm = 30.6 kg\n\nIf you are using a rounded value for g (10 m/s²), you will come up with a mass of 30 kg.  This might be the intended answer if they want you to do it in your head.