Physics 2025
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47 Terms
Acceleration formula
a = final V - initial V / t
Speed formula
s = d/t
Velocity formula
v = d/t
Celcius
C = K - 273
Conventional current
Positive to negative
Current formula
I = Q/t
Density formula
ρ = m/v
Efficiency formula
e = useful p / total p
Electromotive force
Voltage provided by cell driving a unit of charge around a circuit
Electron flow
Negative to positive
Energy formula
W = p x t
Force formula
F = m x a
Law of charges
Like charges repel and unlike charges attract
Momentum formula
p = m x v
Newtons 1st law
Resultant force is required to change motion of an object
Newtons 2nd law
Non-zero resultant force will cause an object to accelerate
Ohms law
V = I x R
Power formulas
I2 x r
I x V
W/t
Pressure formula
P = f/a
Voltage formula
V = I x R
Weight formula
w = m x g
Work formula
W = f x d
Current definition
Flow of electrons
Current unit
Amps (A)
Voltage definiton
Electromotive force or potential difference
Voltage unit
Volts (V)
Energy definiton
The capacity to do work
Energy unit
Joules (J)
Force definiton
Push or pull
Force unit
Newtons (N)
Mass definiton
Measure of the quantity of matter in an object
Mass unit
Kg
Power definiton
Work done per unit time.
Power unit
Watts (W)
Weight definition
The gravitational force on an object that has mass
Work definition
Energy transfer when a force moves an object over a distance
Work unit
Joules (J)
Resistance definition
Opposition to a flow
Charge unit
Coulombs (Q)
Resultant force
mass x acceleration
weight - drag
Terminal Velocity
Constant speed
Gravitational field strength is equivalent to…
The acceleration of free fall.
Friction definition
The force between to surfaces that may impede relative motion and produce heating
What is drag?
Friction that acts on on object moving through a liquid or gas(air resistance)
Energy transferred
Mechanical or electrical work done
How does the Sun release energy?
By nuclear fusion
How do nuclear reactors release energy?
By nuclear fission