Physics
Scientists Say: Equilibrium
This steady state may look like a total standstill, but it’s actually an equal opposition of forces.
HS-PS2-1
Analyze data to support the claim that Newton's second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.
More Stories in HS-PS2-1
- Chemistry
Scientists finally know why ice is so slippery
It’s not because ice heats up and then partially melts. Rather, ice changes at the molecular level — a process scientists have finally modeled.
- 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
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
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
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.
- Physics
Forests could help detect ‘ghost particles’ from space
If trees could act as natural antennas, one physicist proposes that they just might pick up signals of hard-to-spot ultra-high energy neutrinos.
- Physics
Physics explains what happens when a lawn sprinkler sucks in water
Experiments with a floating sprinkler revealed the surprisingly complex physics behind a simple question.
- Physics
How salty does the sea have to be for an egg to float?
Some objects float on top of the ocean, and other objects sink to the bottom. Why? Try this eggs-periment to find out!
- Physics
Scientists Say: Force
When an object experiences a force, its change in motion — or acceleration — depends on its mass.
