Physics-
General
Easy

Question

If a body starts from rest and travels 120 blank c m in the 6th second, then what is the acceleration

  1. 0.20 blank m divided by s to the power of 2 end exponent  
  2. 0.027 blank m divided by s to the power of 2 end exponent  
  3. 0.218 m divided by s to the power of 2 end exponent  
  4. 0.03 m divided by s to the power of 2 end exponent  

The correct answer is: 0.218 m divided by s to the power of 2 end exponent


    S subscript n end subscript equals u plus fraction numerator a over denominator 2 end fraction open parentheses 2 n minus 1 close parentheses rightwards double arrow 1.2 equals 0 plus fraction numerator a over denominator 2 end fraction open parentheses 2 cross times 6 minus 1 close parentheses
    rightwards double arrow a equals fraction numerator 1.2 cross times 2 over denominator 11 end fraction equals 0.218 blank m divided by s to the power of 2 end exponent

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