# Shared Flashcard Set

## Details

Physical Science - Physics
For Wisco
45
Physics
11/30/2011

Term
 What is the SI unit of 1. Length?2. Temperature?3. Mass?4. Force?
Definition
 1. meters2. Kelvin3. kilogram4. Newton
Term
 What is an inclined plane?
Definition
 a slanted surface used to do work
Term
 How can you find the IMA of an Inclined Plane?
Definition
 Length divided by HeightL/H
Term
 What is a wedge?
Definition
 Two inclined planes put back to back to do work.
Term
 How can you find the IMA of a Wedge?
Definition
 Length divided by HeightL/H
Term
 What is a screw?
Definition
 An inclined plane wrapped around a cone or cylinder.
Term
 How can you find the IMA of a Screw?
Definition
 Length divided by HeightL/H
Term
 What is the difference between a Screw and a Bolt?
Definition
 Screw - inclined plane wrapped around a coneBolt - inclined plane wrapped around a cylinder
Term
 What does IMA and AMA stand for?
Definition
Term
 How do machines make work easier? (3 things)
Definition
 1. Increase Force2. Increase Distance3. Change Direction
Term
 What are the 8 types of levers?
Definition
 1st class lever2nd class lever3rd class leverfixed pulleymoveable pulleyblock and tacklewheel and axlegears
Term
 If the IMA is greater than 1, then what does the machine do?
Definition
 It increases the resistance. It may change the direction.
Term
 If the IMA is equal to 1, then what does the machine do?
Definition
 It changes the direction of the resistance.
Term
 If the IMA is less than 1, then what does the machine do?
Definition
 It increases the distance (speed) or the resistance.
Term
 How do you find AMA?
Definition
 Force of the resistance divided by the Force of the effort.Fr/Fe
Term
 On a wheel and axle, where you you apply the effort force?
Definition
 On the wheel
Term
 WHy is IMA always larger than AMA?
Definition
 Friction causes AMA to be smaller than IMA.
Term
 How does a 2nd class lever make work easier?
Definition
 Increases force of the resistance
Term
 How does a 3rd class lever make work easier?
Definition
 Increases distance (speed) of the resistance
Term
 How does a 1st class lever make work easier?
Definition
 Changes the direction of the resistance
Term
 How can you find the IMA of a Pulley?
Definition
 Count the number of supporting strands
Term
 How can you find the IMA of a Wheel and Axle?
Definition
 Radius of the Wheel divided by the Radius of the Axle.r of W/r of A
Term
 {image:|}What class lever does this represent?
Definition
 First Class Lever
Term
 What is the SI unit of volume?
Definition
 Liter
Term
 What is the SI unit of pressure?
Definition
 Pascal
Term
 What is the SI unit of force?
Definition
 Newton
Term
 What is the SI unit of work and energy?
Definition
 Joule
Term
 What is the SI unit of power?
Definition
 Watt
Term
 What is the SI unit of length?
Definition
 Meter
Term
 What is the SI unit of mass?
Definition
 kilogram
Term
 What is the SI unit of time?
Definition
 second
Term
 What is the SI unit of temperature?
Definition
 Kelvin
Term
 Definition of length:
Definition
 measure of straight linedistance bewteen two points
Term
 Definition of mass:
Definition
 measure of matter in an object
Term
 Definition of volume:
Definition
 the amount of space an object takes up
Term
 Definition of temperature:
Definition
 measure of the average kinetic energy in an object
Term
 Definition of time:
Definition
 period between two events
Term
 What are 3 similarities between speed and velocity?
Definition
 1. Both measure Distance and Time2. Both measure movement3. Both are rates
Term
 What are 3 diffenrences between speed and velocity?
Definition
 1. Direction2. Direction in unit3. Vector quanity
Term
 What is force?
Definition
 A push or pull
Term
 What are 2 characteristics of a balanced force?
Definition
 1. They don't change in motion2. They are 2 equal forces in size, but opposite in direction
Term
 What are 2 characteristics of an unbalanced force?
Definition
 1. They change in motion2. They accelerate
Term
 What is friction?
Definition
 two surfaces moving together
Term
 What is static friction?
Definition
 friction between surfaces that are stationary *NOT MOVING*
Term
 What is kinetic friction?
Definition
 friction between surfaces that are moving *MOVING*
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