Physics-
General
Easy

Question

A body thrown vertically upwards with an initial velocity u reaches maximum height in 6 seconds. The ratio of the distances travelled by the body in the first second and the seventh second is

  1. 1 blank colon 1  
  2. 11 blank colon 1  
  3. 1 blank colon 2  
  4. 1 blank colon 11  

The correct answer is: 11 blank colon 1


    Time of ascent equals fraction numerator u over denominator g end fraction equals 6 blank s e c rightwards double arrow u equals 60 m divided by s
    Distance in first second h subscript f i r s t end subscript equals 60 minus fraction numerator g over denominator 2 end fraction open parentheses 2 cross times 1 minus 1 close parentheses equals 55 m
    Distance in seventh second will be equal to the distance in first second of vertical downward motion
    h subscript s e v e n t h end subscript equals fraction numerator g over denominator 2 end fraction open parentheses 2 cross times 1 minus 1 close parentheses equals 5 blank m blank rightwards double arrow h subscript f i r s t end subscript divided by h subscript s e v e n t h end subscript equals 11 colon 1

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