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(phys011)[2010](f)quiz~3224^_10046.pdf
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PHYS 011, Quiz 3 Sol

1. (a) The conservation of momentum ....0=..1..1+(..+..2)..2
So ..2=....0...1..1..+..2
(b) Before collision: ......=12....02
After collision: ......=12..1..12+12(..+..2)..22
The ratio ............=..1..12+(....0...1..1)2(..+..2)2..0..02

2. (a) ..=......=..1....100+..2....3010, and ..1=100.., ..2=.50..+1500
So we get ..=15000 (.....)
(b) At 30s, the rocket reaches its maximum speed.
..=...=..(...........0), get ........=110.3 (../..)