Vectors and forces Flashcards
what is a vector
a quantity that has magnitude(size), units and direction
examples of vectors
displacement, velocity, acceleration ,force , weight
what is a scalar
a quantity that has only magnitude and units
examples of scalars
distance,mass,speed,energy ,time and temperature
resultant force
the sum of two or more vectors acting on the same object and have the same effect
contact force
a force that must touch or be in contact with an object to cause a change
non-contact force
a force that does not have to touch an object to causes a change
types of non-contact forces
- electricity
- magnetism
- gravitation
types of contact forces
- normal force
- frictional force
- applied force
- tension
normal force
the force exerted by a surface onto an object. Normal force is perpendicular(90 degrees ) to the surface
frictional force
the force that opposes motion of an object in contact with a surface it acts parallel to the surface the object is in contact with
applied force
the push / pull of an object
newtons law of universal gravitation
every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
