# Projectile motion formula for horizontal | Gravitation and Motion | meriSTEM

So what happens when our velocity is
zero? Well, this is the case where he dropped the treat straight onto the
floor. But what about when we throw the treats at an angle?
Well, we know that our horizontal and vertical axes are independent. So in the
virtual direction, it doesn’t matter what is happening in the horizontal direction,
because it won’t affect our article motion. Some may saying that we already
have the equations for a vertical motion, exactly, so if we label a vertical
direction our Y axis and real label our variables, then we have the equations of
motion in the vertical direction. However, if we want to understand our object’s
motion, then we still need the equations for a horizontal direction. We all labelled
this our x axis. As we’ve discussed, there are no horizontal forces. Therefore, we
immediately know that our horizontal acceleration is zero, and if our velocity
isn’t changing because our acceleration is zero, then the only possible velocity
in the horizontal direction is our initial velocity, and this has no
dependence on time. So a horizontal displacement is just equal to our
initial velocity times time, plus any initial horizontal displacement. As
previously, if we’re finding displacement from an initial position of zero, then
this term will be zero and our horizontal displacement will just be
equal to the initial horizontal velocity times time. We now have all the equations
that fully describe projectile motion.