Unformatted text preview: × space probe is traveling at a speed of 11000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe’s speed. The retrorockets generate a force of 5 4.0 10 N × over a distance of 2500 km. What is the final speed of the probe? The work energy theorem, 2 2 1 1 f 2 2 W mv mv =, gives 2 f 2 W v v m = + where 5 3 12 = cos 180° = (4.0 10 N)(2500 10 m) = 1.0 10 J W Fs× ×× Now ( 29 ( 29 12 2 3 f 4 2 1.0 10 J 11000 m/s 9 10 m/s 5.0 10 kg v× = + = × ×...
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 Spring '08
 Vellaris
 Physics, Resistance, Energy, Kinetic Energy, kef, Neglect air resistance, 47.0g golf ball, mechanical energy states

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