Take your students on an amusement park ride—for just a penny! Discuss how an object can be accelerating yet moving at
constant speed. Investigate how a change in direction (at constant speed) is acceleration; that is, centripetal acceleration! Continue reading
By MICHELLE TERRA-ALLEN.
The focus of this assignment is to have students direct their own learning to discover the purposeful use of pneumatics and hydraulics and how to incorporate technology to create a useful and stable design. Continue reading
Air pockets surrounding metal balls cut drag up to 90%. Learn more: Read the paper (free): http://scim.ag/2xbi1DZ Continue reading
On a stream of water you can levitate light balls of all sizes and even disks and cylinders. The mechanism is not the Bernoulli effect…
Want to make this at home:
My friend Blake from InnoVinci emailed me with a cool idea for a video and footage of levitating balls in water streams. Initially it was tough to explain the physics of what was going on. The standard Bernoulli effect relies on the object being completely immersed in the upward-flowing fluid. But in this case the water seems to form a single stream around the object and it’s deflected away and down from the stream. By Newton’s third law, the force on the water by the ball is equal and opposite to the force of the water back on the ball, pushing it up into the stream. There is a stable equilibrium position because if the ball moves into the stream, it “cuts off” the water going over the ball so it drifts out. If it drifts out too far, then lots of water passes over the ball, pushing it back into the stream.
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Filmed by Raquel Nuno
Slow motion by Hollywood Special Ops http://hollywoodspecialops.com
It’s amazing how professional baseball players can throw very fast curveballs, but do you know how do curveballs change direction in midair? Continue reading
The zero-g plane allows for a lot of experiments to be conducted without the expense of getting equipment into orbit. Continue reading
Can you solve these four rotation-related riddles? Continue reading
Everywhere that physics is discussed it is safe to presume that the language of mathematics is never too far away. If we were to eavesdrop on these conversations, whether they occur in front of a blackboard or seated at a cafe with large enough napkins, we would not be surprised to hear and see the most instantly recognizable part of the language of mathematics: equations.
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