Multiple choice

A stone dropped from the roof of a building takes 2 seconds to reach the ground. What is the height of the building?

  1. 19.6 m

  2. 39.2 m

  3. 9.8 m

  4. 58.8 m

  5. 0
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A Correct answer
Explanation

Given: u = 0 t = 2 s h = ? We know that, h = ut + ½ gt2 = 0 x 2+ ½ = ( 9.8 x 2 x 2)/2  = 19.6 m Thus, the height of the building =19.6 m

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