Transcript Document
PASS Content Standard 2.2 Gravitation is a universal force that each mass exerts on any other mass. The force of attraction between all objects in the universe. QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Gravitation - 3 min The weakest of the known natural forces. Only becomes obvious when massive objects like stars and planets are involved. QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Gravity - 4 min Near the surface of the earth, gravity accelerates all objects at a rate of 9.8 m/s 2 Near the surface of the earth, gravity accelerates all objects at a rate of 32 ft/s 2 Terminal Velocity the point at which air resistance offsets the weight of a falling object, stopping its acceleration. Any object thrown through the air is a projectile. All projectiles have two velocities. Horizontal and Vertical velocities are separate. Horizontal and Vertical velocities are separate. A projectile's path is always curved. A projectile's path is always curved. QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Juggling - 3 min Orbital Motion Sub-orbital Velocity Escape Velocity Orbital Velocity QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. What is an orbit - 2 min Sputnik The first man-made satellite was launched by Russia on October 4, 1957. QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. 40s and 50s Technology - 6 min Yury Gagarin - April 12, 1961 QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Yury Gagarin - 3 min Alan Shepard - May 5, 1961 QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Alan Shepard - 2 min Gus Grissom - July 21, 1961 QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Gus Grissom - 2 min John Glenn - Feb 20, 1962 QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. John Glenn - 3 min Kepler’s Laws of Planetary Motion: Escape Velocity The velocity needed to escape the orbital gravity of a planet. Escape Velocity For the Earth: • 11.2 km/sec • 25,000 mph • 7 miles/sec Escape Velocity For the Moon - 2.4 km/sec For the Sun - 618 km/sec Newton’s Law of Universal Gravitation All objects in the universe attract each other by the force of gravity. In what year did man first walk on the moon? In what year did man first walk on the moon? 1969 QuickTime™ and a Sorenson Video decompressor are needed to see this picture. To The Moon - 17 min QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Lunar Lander - 2 min In what year was the first shuttle flight? 1981 In what year was the first shuttle flight? QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. The Space Shuttle - 11 min QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. The Countdown - 14 min QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. The Astronauts - 11 min QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. The Payload - 9 min QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Skateboards - 3 min Matter is NEVER weightless weight = m X g m = mass in kilograms g = 9.8 m/s2 Units of weight are Newtons