Unit 1 Formulae Flashcards
N II
F=MA
F= Resultant Force
M= Mass
A= Acceleration
Electrical Power
P=IV
P= Power
I= Current
V= Voltage
Suvat Equations
v = u + at s = ut + ½at<sup>2</sup> v<sup>2</sup> = u<sup>2</sup> + 2as
S= Displacement
U= Intial Velocity
V= Final Velocity
A= Acceleration
T= Time Taken
Weight
W = mg
W= Weight
M= Mass
G= Gravity
Kinetic Energy
Ek=½ mv2
Ek= Kintect energy
M= Mass
V= Velocity
Gravitational potential energy
∆Egrav = mg∆h
∆Egrav = Gravitational potential energy
m= mass
g = gravity
∆h = height
Work done
∆W = F∆s
∆W= Work done
F= Force
∆s= Displacement
Power
Power= Energy/Time
P=E/t
Stokes’s Law
F = 6π ηrv
F= Force (viscous drag)
η= Viscosity
r= radius
v=velocity
Upthrust
F=Vρg
F= Upthrust
V= Volume (of object)
ρ= density (of fluid)
g= gravity
Hooke’s law
F = k∆x
F= Force
k= Stiffness/Spring constant
∆x= Extension
Young Modulus
<var></var>
<var> E</var> is the Young’s modulus (modulus of elasticity)
<dl>
<dd>
<strong><var>F</var></strong>is the <strong>force</strong> exerted on an object under tension;</dd>
<dd>
<strong><var>A0</var></strong>is the original <strong>cross-sectional area</strong> through which the force is applied;</dd>
<dd>
<strong><var>ΔL</var></strong>is the <strong>extension</strong>
</dd>
<dd>
<strong><var>L0</var></strong>is the <strong>original length</strong> of the object.</dd>
</dl>
Elastic strain energy
Eel = ½ F∆x
Eel=Elastic strain energy
F= Force
∆x= Extension
Gradient of displacement time graph
Velocity (Gradient) = Displacement/time
Gradient of velocity time graph
Acceleration (Gradient) = Change in velocity/time
