# a 8 - 3. Ignoring air drag, what is the maximum speed...

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PHYSICS 309K, Fall 2004 HOMEWORK #8, Due Friday 11/05/04 1. Students in a lab measure the speed of a steel ball launched horizontally from a table top to be 4.0m/s. If the table top is 1.5m above the ﬂoor, where should they place a 20cm tall tin coﬀee can to catch the ball when it lands? 2. John and Tracy look from their 80m high-rise balcony to a swimming pool below–not exactly below, but rather 20m out from the bottom of their building. They wonder how fast they would have to jump horizontally to succeed in reaching the pool. What is the answer?
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Unformatted text preview: 3. Ignoring air drag, what is the maximum speed possible for a horizontallymoving tennis ball as it clears the net 1.0m high and strikes within the courts border, 12.0m distant? 4. A certain satellite has a kinetic energy of 8 billion joules at perigee (point closest to Earth) and 5 billion houles at apogee J (point farthest from Earth). As the satellite travels from apogee to perigee, how much work does the gravitational force do on it? Does its potential energy increase or decrease during this time, and by how much?...
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