Discuss the experiment and its implications as performed by Cavendish to determinethe mass of the earth 1. Describe how universal gravitation is used in interplanetary navigationġ0. Discuss the way in which universal gravitation was used to locate new planetsĩ. Discuss the similarities and difference in the motion of projectiles and satellitesĨ. Explain how bulging planetary equators arise from rotation of a planetħ. Discuss the role of universal gravitation in understanding the motion of Halley'scometĦ. Define atmospheric pressure and explain it in gravitational terms.ĥ. Explain how the gravitational interaction between the earth and the moon producestides.Ĥ. Demonstrate understanding of the difference between inertial mass and gravitationalmassģ. Describe the way in which gravitation causes weight and weightlessnessĢ. How is the law of gravitation useful in studies of other planets, stars, and galaxies? Objectives 1. Define two kinds of mass: gravitational mass inertial mass.ħ. What would you experience inside an elevator which was in freefall?Ħ. Distinguish between mass and weight? Use Newton's second law.ĥ. Briefly describe three things which the Universal Theory of Gravitation explains.Ĥ. What does it mean to say that Cavendish "weighed" the Earth?ģ. Why was Newton's Universal Gravitation accepted so readily although therewas no direct experimental confirmation of its validity?Ģ. Last, but not least, we will learn how the gravitational equation was used tofind the mass of earth and other planets. We will learn why planets are flattened at the equator, how the motions of projectilesand satellites are related how Newton's theory of gravitation was tested and usedto find new planets, and how gravitation is used to navigate between the planets. We will see why astronauts are weightless and the relationship between inertialand gravitational mass, how the tides are a result of gravitation,how atmosphericpressure is caused by the weight of air molecules, and how Halley used Newton's equationsto predict the return of the comet that bears his name. We will see how weight is explainedby combining the second law with gravitation. Text References Speilberg &Anderson 101-105īefore we're done with this lesson we will have seen some of the implicationsand uses of Newton's law of universal gravitation.
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