# Velocity and work?

**Classical Mechanics**Level 3

When a body is acted upon a force of \(\left(5\hat{i} + 4\hat{j} - 3\hat{k}\right)\text{ N}\), it begins to move with a constant velocity of \(\left(2\hat{i} - 3\hat{j} - 7\hat{k}\right)\text{ m/s}\). Find the work done(in joules) by the force after 4 seconds.