gravitational field ppt

variation of g with distance . Weight = mass x g (where g = 10N/kg) W = mg. Mass, weight and gravity. Gravitational field• Gravitational field . Introduction to Potential Fields: Gravity Introduction Gravity and magnetic exploration, also referred to as “potential fields” exploration, is used to give geo- scientists an indirect way to “see” beneath the Earth’s surface by sensing different physical properties of rocks (density and magnetization, respectively). The reader who has studied electrostatics will recognize that this is all just a repeat of what he or she already knows. 9.8 N/kg Why is the gravitational field on the Earth greater than that on the moon? If the maximum tension that the cord can withstand before breaking is 175 N, calculate: a) the maximum tangential velocity of the rock ans. GRAVITATIONAL FIELD AND POTENTIAL 5.1 Introduction. is the term we use for the Earth’s gravitational force on an object. Progress Checker 1) Define what is meant by the gravitational field of an object 2) The moon has a mass of 7.35x10 22 kg and a radius of 1740km a) Calculate the value of g at the Moon’s surface b) Calculate the gravitational force on a 25kg object 10m (2s.f) above the surface of the Moon 3) A satellite is orbiting Earth and experiences a gravitational field strength of g=4Nkg-1. For two masses displaced a distance apart, the gravitational force of attraction of one mass on the other is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them. For a constant field and a non-constant field around a spherical object. They do this by assuming gravitational potential energy, P.E = K.E mgh =mu2/2 Where h = vertical distance the marble falls g = gravitational field strength = 10N/kg v = speed of marble m = mass of marble. Value of G is 6.6734 x10-11 Nm2 / kg2 It is due to gravitation that we are walking on the Earth. Example: gravitational field. Normal force. Gravitational Fields 1 . gravitational force we experience all the time here near the surface of the earth might extend outwards as far as the moon, and in fact might be the reason the moon is in a circular orbit. Gravitational Field produced by a mass The gravitational field at a distance r from a mass M can be found by using the equation, G= GM/r2 Thought questions What is the value of the gravitational field on the Earth? Earth gravitational field. Interactive PowerPoint Presentation Custom made animations Includes links to videos and simulations. is the gravitational constant that is equal to 6.67x10-11 Nm2kg-2 (fortunately is a small number). The constant G will remain the same for any two objects anywhere in the Universe. The gravitational field strength of Jupiter is 27 N/kg, and the probe is 1200 kg. On Earth, the gravitational field strength is 9.81 N/kg. → the gravitational attraction is larger at the poles than at the equator . D t i th l f t th t f thDetermine the value of g at the top of the mountain. Newton’s law of gravitation: where: F is the force of gravitation. Units of F are N=kg m s-2 . The Oct. 2016 6360 – 10 km 6360 + 10 km + centrifugal force g ~ 9.83 m/s2 g ~ 29.78 m/s The ellipsoid → Approximation of the Earth‘s shape → the gravitational attraction is larger at the poles than at the equator . 20th International Workshop on Laser Ranging, Potsdam, 9. – 14. That is, when the particle moves from a point r 1 to another point at r 2 in the earth’s gravitational field we have W=F grav⋅dr 1 ∫2 =−Gm E m e r … Newton's Law of gravitation. GRAVITATIONAL FIELDS and the potential energy of a test massm is just U = mΦ (x). The gravitational field is introduced and illustrated. FIELD THEORY WORKSHEET 1. Gravitational Field of a Point Mass A gravitational field is said to exist at a point if a gravitational force F exerted on a test mass m placed at that point in space. If depth of craters produced is proportional to the momentum of the marble, then plotting depth2 against h should result in a straight line. Below are the previews for the slide in Topic 12 - Gravitational Fields. This presentation does not introduce Newton's universal law of gravitation; you can find that in 'Newton’s Gravitation & Cavendish Experiment ppt', also on the TES. Gravity Survey - Measurements of the gravitational field at a series of different locations over an area of interest. Force that prevents an object from falling through the surface of another body. Weight. 5 Example • Mt. It is 3 metres long, 2.8 metreswide and 2.1 metres tall. r is the distance between the masses. The objective in exploration work is to associate variations with differences in the distribution of densities and hence rock types. The strength of a radial field decreases as you move further away from it. We can calculate the gravitational field strength for any object using this method. The gravitational field strength g at a point is defined as: g = force/mass = F/m Gravitational field strength is also known as gravitational acceleration or free-fall acceleration. The gravitational potential energy of an object is the potential energy per kilogram of an object placed at that specific point. For an arbitrary mass density ρx ,the potential is Φ (x)= G Z d3x 0 ρ (x 0) j x 0 (6.4) where G is the gravitational constant and the integral is taken over all space. Fields and the potential energy of an object is the force of gravitation distance between the masses, you also... Rock ’ s centripetal acceleration ans._____m/s2 2 ( x ) weight ) of planet. Ofthehamiltonian ( whichistosay: fromthet-independenceofthepotential ) the reader who has studied electrostatics will recognize this. F t th t f thDetermine the value of g at the poles than at the top the... Test massm is just U = mΦ ( x ) is to associate variations with differences in the of. 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