science 2 Flashcards
what is gravity?
non contact force that gives an obgect its weight
what is an unbalanced force
an unbalanced force changes an object motion
what is a force
a push, pull or twist motion
what is mass
mass is how much matter is inside you
what is matter
matter is the pull of gravity on your mass
what is newton N
newton n measures the amount of force needed to move or lift an object
what is a balanced force
a balanced force dose not change an objects motion
what is air resistance
opposite force to gravity
what is newtons first law
an object in motion will remain in motion and an object at rest will remain in rest unless acted upon be an external unbalanced force
what is friction
friction is the resistance against the movement of an object
what causes friction
surface roughness, deformations
what is a simple machine
devices that make it easier to do work
what is a leaver
simple machine that uses the turning effect of a force to make a task easier
what is the fulcrum
turning point of a leaver
What is the load
Resistance to motion that a leaver works against
