Physics WJEC: Ph1 Key words Flash cards

  • Fun physics flash cards on key words of the of PH1 WJEC.
  • Not for the faint of heart.
HideShow resource information
Scalar
a quantity that has a mangnitude only i.e. Speed.
1 of 32
Vector
a quantity that has magnitude and direction i.e. Velocity
2 of 32
Force (be with you always)
a push or a pull acting on a body from some external body.
3 of 32
Resultant Force
the vector sum of forces acting on a body (sometimes the resultant force is callen the net force.)
4 of 32
Resolving Vectors
finding vectors (the so-called Components) in specific directions, which add together vectorially to make the original vector, and so, together, are equivilent to this vector. (i.e The Horizontal and Vertical components of a vector)
5 of 32
Newtons third law
If a body A exerts a force on body B, then B exerts an equal and opposite force on A.
6 of 32
Free body diagram
a simplified representation of the body along with arrows showing the forces acting on the body.
7 of 32
Density (definition is equation + Units)
Mass/Volume Unit: Kg m¯³ (The mass and volume apply to any sample of the material)
8 of 32
Moment about an axis (Equation)
=Force x Perpendicular distance from the axis.
9 of 32
Principle of moments
For a system in equilibrium the resultant moment = 0
10 of 32
Center of Gravity
the point where the entire weight of the body is considered to act.
11 of 32
Displacement
the displacement of a point B from a point A is the shortest distance from A to B together with the direction.
12 of 32
Mean speed (Equation for definition)
= Total distance travelled/Total time taken (OR the total distance Divided by the change in time)
13 of 32
Mean Velocity (Equation for definition)
=Total displacement/Total time taken (OR change in displacement divided by the change in time) (in graphical representation the direction will usually be represented as a "+" or a "-")
14 of 32
Mean acceleration (Equation for definition)
Change in Velocity/total time taken
15 of 32
Instantaneous Speed
rate of change of distance
16 of 32
Instantaneous Velocity
rate of change of displacement
17 of 32
Instantaneous Acceleration
rate of change of Velocity
18 of 32
Work (equation for explaination)
=Force multiplied by the distance moved in the direction of the force. (i.e. W= Fxcosθ) (the "x" in this case means Distance traveled)
19 of 32
Energy
The ability to do work
20 of 32
Power
Rate of energy transfer [OR the rate of work done] i.e (∆Work done / ∆Time ) { ∆ = the change in... }
21 of 32
Principle of conservation of energy
Energy cannot be created or destroyed only transfered from one form to another
22 of 32
Static Electricity
movement of charges due to rubbing of insulators (different from constant charge flows from cells, ETC.)
23 of 32
Current (include equation)
Rate of flo9w of charge = ∆Q / ∆t (Q= Charge ∆= Change in.. t=time)
24 of 32
Drift velocity
the small average speed of electrons in a conductor due to an applied PD. (PD= Potential difference [AKA. Voltage]
25 of 32
n (in drift velocity equation)
the number of free electrons per cubic metre.
26 of 32
Potential difference (pd) between two points
the energy converted from electrical potential energy to some other form per coulomb of charge flowing from one point to the other. *unit= J C¯¹
27 of 32
The resistance of a conductor
the pd (v) placed across it divided by the resulting current (I) through it. R= V/I (R= resistance, V= PD (or voltage), I= Current) *unit: Ohm (Ω) [= V A¯¹ ]
28 of 32
Ohm's law
the current flowing through a metal wire at constant tempurature is proportional to the pd (Voltage) across it.
29 of 32
Superconductor
a conductor with zero resistance at a specific tempurature (usually when cooled to liquid helium or liquid Nitrogen tempuratures)
30 of 32
Superconducting transition tempurature
the tempurature at which a material, when cooled, suddenly, looses all it's resistance and becomes a superconductor.
31 of 32
EMF
the energy converted from some form (usually chemical [in power supplies]) to electrical potential energy per coulomb of charge flowing through the source. *unit= V
32 of 32

Other cards in this set

Card 2

Front

a quantity that has magnitude and direction i.e. Velocity

Back

Vector

Card 3

Front

a push or a pull acting on a body from some external body.

Back

Preview of the back of card 3

Card 4

Front

the vector sum of forces acting on a body (sometimes the resultant force is callen the net force.)

Back

Preview of the back of card 4

Card 5

Front

finding vectors (the so-called Components) in specific directions, which add together vectorially to make the original vector, and so, together, are equivilent to this vector. (i.e The Horizontal and Vertical components of a vector)

Back

Preview of the back of card 5
View more cards

Comments

Stacie Marks

half of these aren't even specific to wjec

Similar Physics resources:

See all Physics resources »See all resources »