Sir/madam please tell me the answer of question no. - 18 

18.  A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph ? 

Dear Student ,
  • Height, h = 1/2 * g * t^2
  • As height and t^2 are directly proportional, the shape of the graph is a straight line passing through origin and inclined to the axis.
  • From the above expression, it is clear that g = 2 (h / t^2) = 2 * slope of the graph
  • The acceleration due to gravity is obtained by multiplying the slope of the graph with number 2.
  • The graph is shown in the figure given below.


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