Physics
Scientists Say: Equilibrium
This steady state may look like a total standstill, but it’s actually an equal opposition of forces.
MS-PS2-2
Plan an investigation to provide evidence that the change in an object's motion depends on the sum of the forces on the object and the mass of the object.
More Stories in MS-PS2-2
- Materials Science
Spooky! Grooved surface sends ice sailing — no outside push needed
Boulders that have mysteriously moved across Death Valley’s landscape inspired the work. The new surface can slingshot ice in a chosen direction.
- Physics
How to make a pitched ball curve to your will
A range of tricks pitchers use to get curve all come down to the thin layers of air next to the ball — and how a ball’s spin and seams affect them.
- Physics
Scientists Say: Lift
An airplane wing’s unique shape creates air pressure differences that result in this gravity-defying force.
- Physics
Wiggling robots reveal the physics of how Hula-Hoops stay up
Newbies should swing their Hula-Hoops fast and in line with their bodies, the new findings suggest.
- Tech
Bird-inspired airplane wings could boost flight performance
Rows of flaps inspired by a bird wings’ feathers improve airfoil performance to boost lift and reduce drag.
- Tech
Did builders of Egypt’s first pyramid use a water-powered elevator?
A controversial study suggests that ancient people might have used one to hoist the stones used to assemble into King Djoser’s pyramid.
- Physics
Forget moon walking, lunar visitors. Try horizontal running
Researchers took over the Wall of Death, an amusement park attraction, to test out how astronauts might keep their strength up on the moon.
- Tech
Holey basketballs! 3-D printing could be a game-changer
Wilson’s 3-D printed “airless” basketball is nearly silent and will never deflate, but will it prove a slam dunk for players and fans?
- Physics
Aerodynamics involved in shooting hoops can make vehicles greener
Some ships host tall spinning cylinders that act like sails. Roughing the cylinders’ surface will greatly boost fuel efficiency, teen scientists find.
