normal force
Perpendicular contact reaction
Normal force is the support force exerted by a surface against an object pressing into it, acting perpendicular to the surface.
When you stand on the floor, the floor pushes back against you with a normal force equal to your weight.
The normal force prevents the book from falling through the table.
In physics, "normal" here means perpendicular, not ordinary.
At right angles
- contactCommunication or physical touch
- surfaceOutermost boundary layer
- frictionResistance between touching surfaces
- pressureForce upon contact
newton · vector · magnitude · mechanics · statics · dynamics · equilibrium · reaction
Horizontal furniture surface
- floorIndoor walking surface
- wallVertical enclosing structure
- groundSolid surface underfoot
- platformRaised flat structure
ramp · wedge · block · beam · bearing · load · weight distribution · structural
Steadiness or amount owed
- staticWithout motion or change
- stationaryNot in motion
- restCessation of activity
- opposingStanding against something
counteracting · stability · steady state · suspended · motionless · inertia · Newton's first law
perpendicular
At right angles
- contactCommunication or physical touch
- surfaceOutermost boundary layer
- frictionResistance between touching surfaces
pressure · newton · vector · magnitude · mechanics · statics · dynamics · equilibrium · reaction · component
table
Horizontal furniture surface
platform · ramp · wedge · block · beam · bearing · load · weight distribution · structural · foundation
balance
Steadiness or amount owed
- staticWithout motion or change
- stationaryNot in motion
- restCessation of activity
opposing · counteracting · stability · steady state · suspended · motionless · inertia · Newton's first law
- physicsphysics, momentum, atom, acceleration, gravity
- frictionfriction, rubbing, abrading, friction burn, rolling friction
- forcesgravity, electromagnetism, thrust, drag, friction
- vectorsvector field, resultant, magnitude, direction, component
- tractiontraction, tire grip, road grip, friction, ground contact
- staticsequilibrium, forces, moment, torque, static equilibrium
normal forcefriction
Resistance between touching surfaces
shear force · traction · drag
normal forcegravity
Mutual mass attraction
gravitational force · electromagnetic force · magnetic force · weight · gravitational pull
force, normal, abnormal, normality, normalize, normalcy, normalizing, normative, normalized