contestada

A 10. kg book bag is dropped from a height of 2.0 m. The speed of the book just before it hits the floor is A. 9.8 m/s B. 6.3 m/s C. 0 m/s D. 49 m/s

Respuesta :

okpalawalter8

Answer:

The correct option is B

Explanation:

Generally from kinematic equations

       [tex]v^2 = u^2 + 2 gs[/tex]

Here u is the initial velocity with a value 0 m/s this because before the bag was dropped it was at rest

      s  is the height and  g is the acceleration due to gravity

   So

        [tex]v^2 = 0^2 + 2 * 9.81 * 2[/tex]

=>      [tex]v = 6.3 \ m/s[/tex]

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