2007-09-28 - More projectile motion

Homework: pg 78, #50-56, 58-60, 62, 63, 66, 67-70. #66 is bonus. Due Monday.

An object is shot with an initial velocity of 84 m/s at 30 degrees to the horizontal (or same thing: "from the horizontal"). Initial velocity horizontal = 84cos30, and initial velocity vertical = 84sin30.

Remember that we are now working with velocity and acceleration in terms of vectors, so at its maximum height, the horizontal velocity is going to be whatever the initial velocity was, and it's not going to be zero like the 'j' component of the velocity vector. So we're talking two-dimensional now. Before it was only one-dimensional.