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9U3C3

Gravity, Friction, & more Forces in Everyday Life

QuestionAnswer
gravity the force that attracts masses together
weight The measurement of the force of gravity on an object that has mass.
mass the amount of matter in an object
friction the force that opposes movement between touching surfaces and always acts against the direction of motion.
static friction the force of friction between surfaces not in motion
sliding friction friction that occurs when one solid surface slides over another
rolling friction the friction between surfaces, when an object, such as a wheel or a ball, rolls freely over a surface.
fluid friction the friction that occurs as an object moves through a fluid
terminal velocity the speed at which the force of gravity equals air resistance
magnet any material that attracts iron or materials containing iron
electric force the attractive force between opposite charges and the repulsive force between like charges
centripetal force the force that causes objects to have circular motion
buoyancy an upward force exerted by a fluid onto an object that is immersed in the fluid.
force of gravity and mass of the object What are two things that weight depends on?
9.8 m/s2 acceleration due to gravity on earth
center Centripetal force always points toward the _______ of the circular path of motion.
distance The force of gravity decreases as the _________ between masses increase.
repel, attract repel, attractIn magnetic and electric forces, likes _______ and opposite _______.
mass x gravity weight =
Created by: Ms. Greenup
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