# Shared Flashcard Set

## Details

Final Exam
Semester One Phys World Final Exam
51
Physics
01/20/2014

Term
 Motion
Definition
 Any change in position
Term
 Distance
Definition
 The total length that something travels
Term
 Displacement
Definition
 The measurement directly from starting point to ending point.
Term
 Speed
Definition
 The rate of change in position / how something changes in time.
Term
 What is the base unit for speed?
Definition
 m/s (meters/second)
Term
 Does direction matter in Speed?
Definition
 NO
Term
 Instantaneous Speed
Definition
 The rate of speed at any given moment.
Term
 Example of Instantaneous Speed:
Definition
 Car Speedometer
Term
 Constant Speed
Definition
 When speed does NOT change. (Extremely uncommon).
Term
 Example of Constant Speed:
Definition
 Not moving.
Term
 Average Speed:
Definition
 Total distance covered during a certain period of time.
Term
 Velocity
Definition
 The rate of change of motion in a certain DIRECTION. (aka speed in a certain direction).
Term
 Base Unit for Velocity
Definition
 m/s (meters/second) including a direction.
Term
 Vector
Definition
 A line that shows direction and magnitude.
Term
 What is a Vector used for?
Definition
 Velocity, Forces, etc.
Term
 Acceleration
Definition
 The rate of change in velocity.
Term
 What are 3 ways to change Acceleration/ Velocity?
Definition
 Slow down , speed up , or change direction.
Term
 How can Acceleration be positive?
Definition
 Same direction as movement.
Term
 How can Acceleration be negative?
Definition
 Push break in car. (slow down) .
Term
 What is the base unit for Acceleration?
Definition
 m/s2 (meters per second squared) . (m/s/s) .
Term
 Energy
Definition
 The ability to do work.
Term
 Pendulems
Definition
 = awesome.
Term
 Energy is Conserved
Definition
 Means energy is neither created nor destoryed. The amount of energy in the Universe is constant.
Term
 Do we create energy at a power plant?
Definition
 No, we simply transform energy at our power plants.
Term
 Does the sun create energy?
Definition
 No, it exchanges mass for energy.
Term
 Potential Energy
Definition
 is stored energy.
Term
 Kinetic Energy
Definition
 involves motion.
Term
 6 types of Potential Energy:
Definition
 Nuclear , Elastic , Spring , Electric , Gravitational , Chemical Energy.
Term
 Nuclear PE
Definition
 Sored inside neucleus of an atom.
Term
 Elastic
Definition
 Rubber band (when streched) .
Term
 Spring
Definition
 In a mattress , when pushed up and down .
Term
 Gravitational
Definition
 Roller coaster.
Term
 Chemical PE
Definition
 Battery.
Term
 What does one Joule equal?
Definition
 = 1 kgm2/s2
Term
 Potential Energy
Definition
 Height
Term
 Gravitational acceleration:
Definition
 9.8 m/s2
Term
 Why does every object have Gravitational Potential Energy?
Definition
 because everything is lifted up from the surface of the earth.
Term
 What is the base unit for Mass?
Definition
 kg (kilograms) .
Term
 What is the base unit for Energy and Work?
Definition
 J (Joules) .
Term
 Energy is?
Definition
 Conserved
Term
 What does conservation of energy mean?
Definition
 It can change between Kinetic and Potential, but never disappears.
Term
 What is the total amount of energy called?
Definition
 Mechanical Energy
Term
 What are different types of Kinetic Energy?
Definition
 light , heat , sound .
Term
 Force
Definition
 A push or pull one body exerts on another.
Term
 What is the base unit for Force?
Definition
 N (Newtons).
Term
 Balanced Force
Definition
 Equal in size, opposite in direction. (no acceleration).
Term
 Unbalanced Force
Definition
 Unequal forces. (Acceleration occurs).
Term
 Net Force
Definition
 Sum of all forces on an object. Object will move in the direction of the net force.
Term
 Inertia
Definition
 Tendency of an object to resist any change in motion. More MASS equals GREATER Inertia.
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