Answer:
Impact velocity = [tex]v_{f} =[/tex] 147m/s
Explanation:
Impact velocity means the velocity of an object when it just falls on the ground. It is the maximum velocity obtain by an object before it stopped by something.
Given data:
Initial velocity = [tex]v_{i} = 0[/tex]
Time = t = 15 s
Gravitational acceleration = g = 9.8 m/s²
Final velocity = impact velocity = [tex]v_{f}=?[/tex]
According to first equation of motion
[tex]v_{f} = v_{i} + gt[/tex]
As inial velocity is zero so
[tex]v_{f} = gt[/tex]
[tex]v_{f} = (9.8)(15)[/tex]
[tex]v_{f} = 147m/s [/tex]
Impact velocity = 147 m/s
