This unit we began looking at projectile motion which is combing the vertical and horizontal movement of an object. It is really interesting so far because now I know how it works when I see airplane drop a bomb in a movie. The first thing we learned is that axes are independent (except for time). This rule serves as a basis to many of the concepts we have learned so far in this unit. This rule (aka the Vegas Rule) can better be defined: What happens on the x-axis stays on the x-axis, and what happens on the y-axis stays on the y-axis. We also learned that the velocity for the x-axis is always constant but the the velocity fot the y-axis always changes because of gravity. Like we learned in the last unit, gravity never turns off, so there is always a downward acceleration of 10 m/s^2.
When solving for projectile motion problems, we still use the three kinematic equations, DAT, VAT and VAD except when we collect all of the given information, we have to collect for both the x and the y because projectile motion goes both ways. One rule when solving word problems is to find the time in the ayer. We spelt air like that to remind us that we need to find the time for the y-axis.
The picture above is relevant to Unit 4 because today we did a lab that used this device to shoot out a ball and represent projectile motion. We used the rules we learned today and the three equations to solve accurately and precisely for where the ball would land.
I think this is a fun video to represent projectile motion in a really cool way! (I can't even shoot a basket from two feet away)
adding the video was awesome and provided multiple examples of the material.
ReplyDeleteThat was a really, really good summarization of the unit so far. It clarified some thing I didn't totally understand as well, like whether or not the velocity on the x-axis stays constant. I also think it's really cool that now I can understand exactly why airplanes have to drop bombs early, and stuff like that.
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