Example 6: Impact Speed of a Projectile Hitting the Ground - 3Speak - YouTube - Summary - Notes - Playlist - Vector Functions playlist

In this video, I determine the time a projectile is in the air, the distance it travels, and the speed it impacts the ground after being launched from 10 meters at an angle of 45 degrees and a speed of 150 m/s. I use the parametric equations of trajectory I derived in my earlier video, and set the y component equal to zero to obtain the time when the object hits the ground. Plugging in that specific time value into the x component yields the distance. To get the velocity, we take the derivative of the position vector and then obtain the speed using the same time value, which is 151 m/s, which is similar to the launch speed.

#math #vectors #calculus #physics #education

Wells Fargo Bank filed a patent in 2016 for a smart dust ID and payment verification system. 🤯

🔬#MESExperiments 54: SpillNot Centripetal Tray - 3Speak - YouTube - Playlist (Hive)

In this experiment I showcase the amazing SpillNot centripetal waiter's tray, whose circular motion can balance a cup of water without spilling it over, even while performing a full 360 degrees upside down! The SpillNot works on the principle that circular motion involves a centripetal force that brings the tray back towards the centre of the circular motion — this results in the cup of water experiencing a normal force far directly onto the tray, which far exceeds the downwards force due to gravity. The most astonishing part is that even a straw placed in the cup barely even experiences any slight nudge as it moves at rapid speeds. I also place my phone in the tray with both front selfie camera and rear camera views to further illustrate this amazing phenomenon!

#physics #experiment #centripetalforce #inertia

9/11 Pentagon witness and videographer Bob Pugh describes the lack of plane parts at the Pentagon, especially compared to the Air Florida 90 plane crash site in 1982 that he filmed.

Note also the constant thick fumes (dustification) pouring out of what appears to be several meters away from the wall of the Pentagon. - Full video

UBC doing a lab study on how prepared people with disabilities are during "Climate Emergencies".... 👀