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Unit 3 Study Guide - FORCE

Terms in this set (23)

Applied Force
any push or pull
Friction
opposite motion, slows things down
Static Friction
Object doesn't move
Rolling Friction
between a round object and a surface
Sliding Friction
Between 2 objects moving past each other
Fluid Friction
Between an object and water
Drag (air resistance)
between an object and the air
thrust
moves an object forward
lift
moves object up off the ground
normal force
opposite gravity when object is on a surface
gravity
pulls objects to earth; attraction between 2 objects that have mass
weight
gravitational force
centripetal acceleration
change in direction towards center of a circle
centripetal force
force that causes objects to move in circle
momentum
how much force is needed to change motion
Newton's First Law of Motion
objects keep moving unless force act on them
Newton's Second Law of Motion
an object's motion is affected by force and mass
Newton's Third Law of Motion
every force has an equal and opposite force
What does the force of gravity depend on?
Mass of both objects and how far apart they are. Gravity is a FORCE that pulls objects together
Why is a projectile motion pathway curved?
Gravity pulls the object down
The Law of Conservation of Momentum
Momentum can't be created or destroyed
Elastic collision
Occurs when the objects "bounce" off each other and no energy is lost to changes in shape
Inelastic collision
Occurs when the objects get "stuck" to each other or energy is lost to changes in shape
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