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Science 7 10-1/2
Question | Answer |
---|---|
force | push or pull |
unbalanced force | causes object to start moving, stop moving, or change direction |
newton | unit to measure force |
net force | total force |
balanced force | equal forces acting in opposite directions |
friction | force when two objects rub against each other |
factors that affect friction | how hard surfaces push together and type of surface |
static friction | not moving |
fluid friction | solid moves through a liquid |
friction | acts in opposite direction of motion |
gravity | force that pulls objects toward each other |
gravitational attraction | dependent on mass and distance |
free fall | only force acting on object is gravity |
air resistance | type of fluid friction |
terminal velocity | force of air resistance equals weight of object |
projectile | object that is thrown |
mass | amount of matter |
weight | changes based on gravitational force |