Given data:
* The initial velocity of the ball at the peak point is 0 m/s
* The final velocity of the ball is 100 m/s
Solution:
By the kinematic equation,
[tex]v-u=gt[/tex]where v is the final velocity, u is the initial velocity and g is the acceleration due to gravity, and t is the time for which the ball is in free fall,
[tex]\begin{gathered} 100-0=9.8\times t \\ 100=9.8\times t \\ t=\frac{100}{9.8} \\ t=10.2\text{ s} \end{gathered}[/tex]Thus, the ball was in free fall for 10.2 seconds.
