forces and their interactions Flashcards
what is a scalar quantity
a quantity which only has a magnitude and that isnt direction dependent
what is a vector quantity
a quantity that has both a magnitude and an associated direction
how can a vector quantity be drawn and what does it show
as an arrow, the length of the arrow represents the magnitude and the arrow points in the associated direction
what is a force
a push or pull acting on an object due to an interaction with another object
2 categories forces can be split into
non contact and contact forces
3 examples of contact forces
air resistance, friction, tension
3 examples of non contact forces
gravitational, electrostatic and magnetic forces
is a force a vector scalar quantity
a force is a vector quantity as it has both a magnitude and an associated direction
3 examples of vector quantities
velocity, displacement, force
3 examples of sclar quantities
time, mass, temperature, speeed
what is weight
force that acts on an object due to gravity and objects mass
unit for gravitational field strength
n/kg
what is unit for weight
newtons
what quantities does weight depend on
objects mass and the gravitational field strength at given position in the field
what is meant by objects centre of mass
single point where objects weight can be considered to act through
