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Unformatted text preview: [Answer in terms oF m and v .] b. Describe the motion oF the CM oF the system while the pieces are in the air. [What external Forces are acting?] c. IF the lighter piece lands at distance R north oF the original launch point, where does the heavier one land? [Answer in terms oF R .] a. At the instant oF explosion the system is at rest. By conservation oF momentum the heavier mass has speed v /2 . The total kinetic energy is 1 2 mv 2 + 1 2 (2 m )( v /2) 2 = 3 4 mv 2 . This is the energy suppled by the explosion. b. The only external Force is gravity, so the CM Falls straight down. c. The heavier one lands at distance R /2 to the south. The CM lands at the launch point. [Its not that simple iF they dont land at the same time, because the ground supplies another external Force when they land.] Physics 53 Summer 2010 2...
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This note was uploaded on 10/19/2011 for the course PHYSICS 53L taught by Professor Mueller during the Spring '07 term at Duke.
- Spring '07