T2 forces Flashcards
define scalar
only magnitude (size) no direction
example of scalar quantities
mass
temperature
speed
time distance
energy
define vector
have magnitude and direction
example of vector quantities
displacement
weight
force
velocity
acceleration
momentum
example of contact force
tension
friction
air resistance
normal contact force
example of non contact force
gravitational force
electrostatic force
magnetic force
what is weight of an object directly proportional too
mass of an object
What can you calculate weight (N) with
newtonmeter
define centre of mass
weight of an object acting at a single point
calculation for resultant force
larger force - smaller force
what are changes in elastic called
elastic deformation
what do inelastic materials nor do
return to original length
gradient calculation
distance travelled/ time taken
newtons first low of motion
if a resultant force acting on a stationary object is 0 then it will remain stationary
if the resultant force acting on moving object is 0 then the object will continue moving in the same direction at the same speed
newtons 2nd law of motion
the acceleration of a object is proportional to the resultant force acting on the object and inversely proportional to the mass of the object
