!! 6.5.1, Forces and their interactions Flashcards
what does an object’s velocity describe
which quantity is velocity and why
it’s direction as well as it’s speed
vector
because it has a magnitude (or size) and a direction
what is a scalar quantity
quantities that only have a magnitude (size)
and do not have a direction
what is acceleration measured in
meters per second squared
list 3 vector quantities
velocity
acceleration
force
list 4 scalar quantities
energy
mass
speed
temperature
when a vector quantity is represented by an arrow, how do you find the magnitude and direction of the vector quantity
length of arrow = the magnitude
direction of arrow = the direction of the vector quantity
what is a force
a push or pull that acts on an object due to an interaction with another object
what’s the difference between a contact force and a non-contact force
contact forces – the objects are physically touching
non-contact forces – the objects are physically separated
4 examples of contact forces
friction
air resistance
tension
normal contact force
3 examples of non-contact forces
gravitational force
electrostatic force
magnetic force
what is weight
and what does the weight of an object depend on
the force acting on an object due to gravity
depends on the gravitational field strength at the point where the object is
what is weight measured in
what is mass measured in
what is gravitational field strength measured in
Newtons
Kilograms
Newtons per Kilogram
what physical apparatus is weight measured with
a calibrated spring-balance (a newtonmeter)
what is a resultant force
a single force that has the same effect as all the original forces acting on an object
together
