Presentation top top theme: "Fast relocating Projectiles: Satellites The earth satellite is just a projectile that falls around the earth rather than right into it."— Presentation transcript:




You are watching: An earth satellite is simply a projectile

1 quick Moving Projectiles: Satellites The planet satellite is merely a projectile the falls approximately the earth rather than right into it.

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3 A typical misconception is the satellites orbiting in ~ high altitudes are cost-free from gravity. The high altitude only allows the satellites to go over atmosphere, but they room in the field of the earth gravity.

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4 question A newspaper report reads in part, “ The space shuttle orbits earth at one altitude of nearly 200 miles and also is travel at a rate of 18,000 mph. The shuttle stays in orbit since the gravitational pressure pulling the toward planet is balanced by the centrifugal force (the force of inertia) that is pulling it away from Earth”. Explain why this newspaper should hire a brand-new reporter.

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5 concerns A vine is just solid to support Tarzan once he is hanging straight down. However, as soon as he tries to swing indigenous tree to tree, the very same vine division at the bottom of the swing. How can it happen?

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6 A common misconception is the satellites orbiting at high altitudes are cost-free from gravity. The high altitude only allows the satellites to go above atmosphere, but they space in the ar of the planet gravity.

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7 Rotational movement

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8 Aristotle: There room two to adjust of organic laws: one because that earthly events, and also another, altogether different, for movement in the heavens.

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9 The concept of gravity

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10 Newton’s regulation of universal Gravitation at any time a body has a pressure exerted top top it, that force is exerted by some other body.

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11 Every thing on the surface of the planet feels the force and also this pressure is directed toward the facility of the Earth.

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12 What around accepting this idea: force, “acting in ~ a distance” ?

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13 What is the Centripetal Acceleration that the Moon? a M ~ g/3600

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14 The Universal regulation of Gravity force ~ mass 1 x mass 2 /distance 2

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15 question 1.The Moon falls around the planet than straight into it. If tangential velocity to be zero, just how would the Moon move? 2.According to the equation because that gravitational force, what wake up to the force in between two bodies if the fixed of among bodies is doubled? If both masses are doubled?

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16 Newton’s legislation of global Gravitation Every fragment in cosmos attracts every various other particle through a force that is proportional to the product of their masses and inversely proportional come the square of the distance in between them. This force acts along the heat joining the 2 particles. F = G m 1 m 2 /r 2

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17 The global Gravitational consistent G F = Gm 1 m 2 /d 2 G = 6.67 10 -11 Nm 2 /kg

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18 Gravity and also Distance The inverse Square law The station square law holds because that gravity and for all phenomena within the effect from a localized source spreads uniformly transparent the surrounding space: the electric field of an electron, light from a match….

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19 inquiries 1.If over there is an attractive force in between all objects, why carry out we not feel gravitating toward massive buildings in out vicinity? 2.Consider an apple in ~ the peak of the tree that is traction by earth gravity with a pressure of 1 N. If the tree were twice as tall, would the pressure of heaviness be only ¼ together strong? safeguard your answer.

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20 Weight and also Weightlessness

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21 come be more general we now refine the definition of weight: load of other is the force it exerts against a support.

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22 question In what feeling is drifting in room far away from every celestial bodies prefer stepping off the table?

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23 ocean Tides

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24 inquiry We recognize that both the Moon and the Sun develop our ocean tides, and we recognize that the Moon plays the greater role because that is closer. Does the closeness median it traction with much more gravitational pressure than the sunlight on the planet oceans?

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