Finally we get to use all these vectors we have been going over the past few weeks. First here are the answers from yesterday:
The question:
A jet plane is flying at a constant altitude. At time t1 = 0 it has components of velocity Vx = 90m/s, Vy = 40m/s. a) Sketch the velocity vectors at t1 and t2. At time t2 = 30.0 s the components are vx = -170 m/s, vy = 40 m/s
How do these two vectors differ? For this time interval calculate (b) the components of the average acceleration, and (c) the magnitude and direction of the average acceleration.
Projectile Motion
A projectile is any object that follows a path that is completely determined by gravitational acceleration and air resistance, all the while giving an initial velocity to start. A projectile that is following a path is also known as a trajectory.
Try this example for fun: Grab to items of the same weight (about) and hold them in your hand at the same height. Next drop one of the objects and throw the other object a few inches out. Which one will reach the ground first? Trick question ;)
They should reach the ground around the same time. Something that is very interesting when I first started learning physics. As of right now we will not include air resistance in our equations for projectile motion.
Heres another question for you to figure out: (Will post tonight or tomorrow morning)
A batter hits a baseball so that it leaves the bat at speed v0 = 37.0 m>s at an angle a0 = 53.1°. (a) Find the position of the ball and its velocity (magnitude and direction) at t = 2.00 s. (b) Find the time when the ball reaches the highest point of its flight, and its height h at this time. (c) Find the horizontal range R—that is, the horizontal distance from the starting point to where the ball hits the ground.
