force pressure moments Flashcards
force
push or pull that one object exerts on another object
contact force
forces that exist between objects that are in contact with one another
non-contact force
non contact forces do not require objects to be in contact with another
weight or gravitational force
pull of earth or some other massive body acting on object
tension
pull along of a stretched object e.g. a stretched spring which acts resists the stretching
magnetic force
the push or pull exerted between magnets or the pull of magnets on magnetic materials
electric or electrostatic force
push or pull between electric changes
normal reaction force
push exerted by a surface on an object pressing on it. this force is always perpendicular to the surface
friction
contact force that opposes or tends to oppose motion between surfaces in contact
resistance force
a viscous force set up in fluids such as oil and air when movement occurs within them
balance force
balanced force are those that are opposite in direction and equal in magnitude in each other
equilibrium
condition of a system when all forces acting on it are balanced
vector
physical quantity that has both magnitude and direction
scalar
physical quantity that has magnitude only
centre of gravity
point through which the weight of an object appears to act
