How much kinetic energy to propel an object

[5P@N]

Homework Statement

A Physics textbook weighing 3 kg needs must be launched into a nearby trash can. The velocity necessary to accomplish this feat is 4 meters per second when unleashed in its flight.
Assume no wind resistance.
What energy is necessary to accomplish this deed?

Homework Equations

Kinetic energy = .5 * mass * velocity^2

The Attempt at a Solution

.5 * 3 kg * 16 m^2 s^-2 = 24 Joules

Kosher? Thoughts?

 

[Bystander]

Looks good here.