forces Flashcards
what is a force
a vector quantity (magnitude and direction)
what is a resultant force
multiple forces act on an object at once , resultant force is the overall force acting on the object
how to calculate resultant force if 2 forces are acting in opposite direction
subtract
how to calculate resultant force if 2 forces are acting in same direction
add
when a question asks for resultant force what must you give
a magnitude (in newtons) and a direction (can be left/right/up/down) or an angle calculated by trig
what are the 2 effect of forces
balanced and unbalanced forces
what is the movement of the object linked to
resultant force acting on the object
what does balanced forces mean?
no resultant force, constant velocity or stationary
what does unbalanced forces mean
a resultant force is acting
object is accelerating or decelerating
what is the acceleration if resultant force is zero?
no acceleration
what is the relationship between acceleration and resultant force if mass is constant
directly proportional
what is the relationship between acceleration and mass if force is constant
inversely proportional
equation for resultant force
mass x acceleration
what is weight
force, measured in newtons, gravitational force acting on a mass in a downward direction.
weight depends on the acceleration of freewill
equation for weight
mass x gravitational field strength
