Answers

  • Brainly User
2014-11-21T17:57:45+05:30
It is √[20²+30²]/2 = √650 = 25.49 m/s
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WRONG
you must mention the rule or law for applying it. simply numerical calculation is not appropriate.
2014-11-22T11:34:20+05:30

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AB = s
     2 a s= (30² - 20² ) = 500          s = 250/a

AB/2 = s/2
       2 a s/2  = (v² - 20²) 
       250 = v²  - 400    =>  v = √650 m/s
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