Physics Space 1. The Earth has a gravitational field that exerts a force on objects both on it and around it Define weight as the force on an object due to a gravitational field Mass is a measure of the amount of matter in an object‚ it is measured in kilograms (kg). The weight of an object is a measure of the force with which it is attracted by a gravitational force‚ it is measured in Newtons (N). It is directly related to the strength of the gravitational field at a point where the object
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Cavendish and the Value of G The law of universal gravitation states that the gravitational attraction amongst two objects is directly proportionate to their masses times each other and inversely proportional to the distance between the centers squared. This law looks like: In this very equation‚ G represents the universal gravitation constant. This constant was not set in stone until Lord Henry Cavendish came across and experimentally determined the value of G using a torsion balance. Cavendish’s
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from a certain height to Earth’s surface. In this experiment we tested the idea that no matter what the size‚ shape‚ color‚ etc. of the object if it would still experience the same constant acceleration throughout its fall (short distance). The constant downward acceleration it experiences is due to Earth’s gravitational force (g). We measure the position‚ and velocity of a ball to get the experimental g. We then measured reaction time with a ruler. We used our data and g‚ to get an average distance
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not it is possible to escape the gravitational field of the Earth. Carla shows Jenny the system below where mass mis rE (not the Earth ’s radius) distant from Earth and rP (not planet P ’s radius) distant from planet P. Carla states that the mass m has escaped if FP on m = FE on M. Which one‚ if either‚ is correct‚ and why? Question options: 1) Carla‚ because the total gravitational force on m is zero at that point. 2) Carla‚ because there is no gravitational force from Earth on m at that point
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of r. G = 6.67 x 10-11 Nm2/kg2 ; the universal constant of gravity g = Gm / r 2 People’s Physics Book ; gravitational field strength or gravitational acceleration of a planet with mass m and radius r. Note that this is not really a separate equation but comes from Newton’s second law and the law of universal gravitation. Ch 12- 1 Key Concepts • • • • • When using the Universal Law of Gravity formula and the constant G above‚ make sure to use units of meters and kilograms
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Essentially‚ gravity is not only what allows us humans to live our trivial lives‚ but it also keeps the earth from exploding into flames‚ believe it or not. Earth‚ along with every other planet in our solar system in caught within the Sun’s MASSIVE gravitational pull. Can be of that fact‚ is how we have seasons. Earth‚ along with the other planets‚ is constantly rotating around the sun‚ all due to its pull. The moment you‚ or any other object‚ jumps or is tossed into the air‚ gravity brings you back
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have been imagined a mere two decades ago. 2. Concept and purpose of gravity Gravity is the weakest of the four fundamental forces‚ yet it is the dominant force in the universe for shaping the large scale structure of galaxies‚ stars‚ etc. The gravitational force between two masses m1 and m2 is given by the relationship: Newton’s Law of Universal Gravitation r - the distance separating the centers of mass of the objects F - the force of gravity
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the interaction between a very large object‚ the Earth‚ and much smaller objects that are very close to it. This is a very limited range of the possibilities. Software simulations of gravity allow physics students to explore a variety of other gravitational interactions between objects. These activities are designed to be used with the JAVA applet My Solar System that can be found on the Physics Education Technology (PhET) website at the University of Colorado at Boulder. Directions: Go to the My
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February 25‚ 2013 Lab: Equilibrium of Forces Purpose/Objective: The objective of this lab was to test the first condition of equilibrium for a set of concurrent coplanar forces‚ prove Lami’s Theorem‚ and to determine an unknown mass using rules of equilibrium. Procedure: In the lab‚ we wanted to find at what angles three separate weights would create a net zero force on a force table so that the ring holding the weights was exactly centered in the middle
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the concentrations do not change with time. These reactions are said to be in equilibrium. Equilibrium is depended on a particular temperature‚ and the concentrations of reactants and products have to follow a rule demonstrated by the equilibrium constant Kc. The equilibrium concentrations that will be studied is the reaction between iron (III) ion and thiocyanate ion: The mixture of Fe3+ and SCN- react to form a compound that produces a dark brown/red color. Since this is the case‚ it means the
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