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Question

A body is thrown vertically upwards with velocity u. The distance travelled by it in the fifth and the sixth seconds are equal. The velocity u is given by (g equals 9.8 blank m divided by s to the power of 2 end exponent)

  1. 24.5 blank m divided by s  
  2. 49.0 blank m divided by s  
  3. 73.5 blank m divided by s  
  4. 98.0 blank m divided by s  

The correct answer is: 49.0 blank m divided by s


    The given condition is possible only when body is at its highest position after 5 blank s e c o n d s
    It means time of ascent equals 5 blank s e c
    and time of flight T equals fraction numerator 2 u over denominator g end fraction equals 10
    rightwards double arrow u equals 49 blank m divided by s

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