Question

During free fall after 7 seconds what would be the velocity of a falling ball ,knowing that the acceleration due to gravity g=9.8 m/s2

Answer 1

Vf = 68.67[m/s]

Step-by-step explanation:

To solve this problem we must use the following kinematics equation:

`v_(f) = v_(i)-(g*t )`

where:

Vf = final velocity [m/s]

Vi = initial velocity = 0

g = gravity = - 9.81 [m/s2]

t = time = 7 [s]

Vf = 0 - (-9.81*7)

Vf = 68.67[m/s]