That you just could also find been sheltering in situation for weeks now, and that you can in fact consume some more fun physics puzzles to resolve, am I moral? Don’t terror. The entire physics complications you would possibly possibly possibly also imagine are moral right here on the derive—along with some you never will find imagined. This is one that you can now not derive in any textbook:
- A person with a basketball stands on one pause of a seesaw. An elephant stomps on the opposite pause. What happens?
Neatly, naturally, the fellow strikes through the air and over the elephant—then over every other elephant (attributable to the keep there’s one pachyderm there’s potentially every other). Then he slam-dunks the ball through a hoop earlier than hitting a bale of hay. That you just could’t form these items up. This is the video—seriously, you would possibly possibly have to creep making an try to derive this.
Are you thinking what I’m thinking? This is appropriate begging for some physics evaluation. Let’s derive started!
1. Is it real?
Oh, this a colossal quiz. As you would possibly possibly possibly even find heard, there’s a mode of spurious stuff online. To hunt for if right here’s legit, we wish to analyze the circulation and glance if it follows total physics devices. For that, we wish to derive some files from the video. The consume of the Tracker video evaluation app, I’m in a position to derive the placement of the fellow in every physique of the video. Judge of x,y coordinates—horizontal circulation is within the x direction, vertical within the y direction.
So for a real (now not spurious) projectile human, there’s handiest one drive acting on him after he leaves the flip board, and that is the downward gravitational drive (assuming a negligible air-resistance drive). In which case, his trajectory will must find the following aspects of identical old projectile circulation:
- Fixed horizontal speed
- Fixed vertical acceleration
- Vertical acceleration of –9.8 m/s2 (discontinuance to Earth’s floor)
Customarily, this would be easy to examine. I’d place the horizontal situation as a feature of time to creep making an try to derive if it be a straight line, which would possibly possibly perhaps possibly present constant speed. I’d attain the identical notify for the vertical situation to expose that it be a parabola connected with constant downward acceleration. But that won’t work right here, since the video shifts to gradual-circulation within the guts, so the time from one physique to the next isn’t constant.
Don’t effort. I’m in a position to fix this. As every other of plotting x vs. t and y vs. t, I will place y vs. x—right here’s known as the trajectory place, because it reveals the utter situation of the fellow as he strikes through the air. Here’s what I derive:
This is the trajectory for the total notify, including the pause the keep he bounces off the hay bale and flips over. But appropriate having a uncover a examine the guts of the place, it does certainly seek for love a parabola. Tracker also match a quadratic equation to the knowledge for me, and you will doubtless be in a position to also glance from the solid curve above that it’s a valid match. Listed below are the ensuing parameters:
Does that mean it be real? Not basically. But it’s encouraging; if it didn’t
