Skipping stones takes a little practice and finesse, so Mark Rober enlisted his extended family to help build the perfect rock-skipping robot. Their creation, named Skippa, ended up helping humans learn, too.
I built a rock skipping robot with the help of my nieces and nephews to understand the perfect way to skip a rock. In the end we learned that 4 things matter most:
1) Rock angle of 20 degrees
2) Rock PATH angle of 20 degrees
3) Spin the rock as much as possible
4) Choose a rock that is flat on the bottom and as heavy as possible for you to still get to your max arm speed.
Astronaut David Scott re-created, in 1971 during the Apollo 15 mission, Galileo’s “falling bodies” experiment by dropping a hammer and feather on the moon at the same time. Simply, both fell at the same rate because there was no air resistance. screengrab via Wonders of Physics/YouTube (Digg)
For years, dirty countertops, appliances, or bathroom fixtures were just kind of gross. But unkempt corners of your kitchen and bathroom aren’t just a sign of laziness anymore. Now, they’re a potential breeding ground for infectious disease. You can’t just limp through cleaning these days. You’ve gotta get rigorous about it, which means it’s no […]
Hunting around for an outlet or a power battery when you’re trying to charge your phone or tablet is always an annoyance. But when you’re out in the world hiking or camping or traveling, finding an outlet might be more than a minor inconvenience…it might be downright impossible. Running low on battery power isn’t an […]
“Live as if you were to die tomorrow. Learn as if you were to live forever” – Mahatma Gandhi Of all the skills you feel like you should probably know, yet likely don’t, coding might be one of the most intimidating. From the varied programming languages to the range of platforms to the sheer discomfort […]