Question

If a stone is thrown vertically upward with a velocity of 25 m/s, what will be the velocity of the stone after 1 second?

Answer 1

Vf = 15.19 [m/s]

Step-by-step explanation:

To solve these problems we must use the following kinematics equation:

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

where:

Vf = final velocity [m/s]

Vi = initial velocity = 25 [m/s]

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

t = time = 1 [s]

Note: the negative sign of the equation means that the gravitational acceleration acts in the opposite direction to the movement of the stone.

Now replacing:

Vf = 25 - (9.81*1)

Vf = 15.19 [m/s]