Question

A student throws a ball straight down off a very high building with a magnitude of 3m/s and
accelerates in free fall for 2.0 s.
What is the velocity of the ball at 2.0 s?

Answer 1

Answer:

Vf = 22.62 [m/s] in 2 seconds.

Explanation:

In order 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 = 3 [m/s]

g = gravity acceleration = 9.81 [m/s^2]

t = time = 2 [s]

Vf = 3 + (9.81*2)

Vf = 22.62 [m/s]