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force and motion review 2
physical science
20
Science
4th Grade
09/24/2011

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Cards

Term
friction
Definition
a force that pushes back on an object
Term
unbalanced forces
Definition
forces that are no longer equal that cause motion
Term
chemistry
Definition
the study of structure make up,and changes of matter
Term
balanced forces
Definition
causes an object not to move
Term
motion
Definition
an object's change in position or location
Term
static friction
Definition
friction an object must overcome to start moving
Term
newton
Definition
a standard unit of force depicted as N
Term
speed
Definition
  1. the distance travled by an object divide by time
  2. measurment of how fast an object is moveing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Term
velocity
Definition
the speed and direction of a moving object
Term
How is motion described?
Definition
in terms of speed and direction
Term
What is mechanical energy?
Definition
the energy possessed by an object due to it's motion or position
Term
What is energy
Definition
the ability to make something happen
Term
What are the 2 main categories of energy?
Definition
potential energy and kinetic energy
Term
How are the 2 main categories for energy different?
Definition
because potential is stored energy that could move but kinetic energy is moving
Term
How is force often descried?
Definition
by size and direction
Term
Motion is...
Definition
kinetic mechanical energy that causes an object to move
Term
What symbol do we use show or depict force?
Definition
we use arrows
Term
When does friction occur?
Definition
when an object must move over or threw another type of matter
Term
What instrument do we use to measure force?
Definition
spring scale
Term
What two things must be measured to figure out the speed of an object?
Definition
the distance the object is traveling and the amount of time it took to travel the distance
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