Ch3_3 #2

You should never attempt a projectile motion problem without having the 5 equations on the bottom half of Sheet 27 in front of you.
Part A:
What is the y-component of the initial velocity when the rifle is aimed horizontally (See Ch 3 Sheet 25') ? Go "shopping" among the y-equations to get the "sinking-time" the bullet takes to traverse the change in the y-component of the position.
Part B:
Go "shopping" among the x-equations to get the x-component of the initial velocity.
Is the speed, i.e. the magnitude of the full initial velocity vector, different from only the x-component of the initial velocity ?