Physics Equations Flashcards
1
Q
Gravitational Force
A
F = mg
Units: N
2
Q
Electrostatic Force
A
F = kQq/r^2
Units: N
3
Q
Kinetic Energy
A
KE = 1/2 * mv^2
Units: J
4
Q
Potential Energy
A
PE = mgh OR PE = kQq/r
Units: J
5
Q
Mechanical Work
A
W= Fdcosθ
Units: J
6
Q
Translational Motion
A
The Big 4
d = vi*t + 1/2 at^2 d= (vi + vf / 2) * t vf= vi + at vf^2 = vi^2 + 2ad
7
Q
cos90
A
= sin 0
= 0
8
Q
cos60
A
=sin30
= sqrt(1) / 2
9
Q
cos45
A
= sin45
= sqrt (2) / 2
10
Q
cos30
A
= sin60
= sqrt (3) / 2
11
Q
cos0
A
= sin90
= 1
12
Q
Vf =
A
= vo + at
13
Q
Vf^2 =
A
= vo^2 + 2ad
14
Q
d =
A
= vi*t + 1/2 at
= (vi + vf / 2) * t
15
Q
F =
A
= ma
= -kΔx
16
Q
Fg =
A
GMm/r^2
17
Q
Mechanical Advantage =
A
= Fout / Fin
18
Q
Efficiency =
A
= Wout / Win
19
Q
F =
A
= -kΔx
= ma
20
Q
Ff =
A
= uFn
21
Q
t =
A
r Fsin θ
22
Q
KE =
A
1/2 mv^2
23
Q
P =
A
W / t
24
Q
Wnet =
A
ΔEk
25
W =
F d cosθ
26
Espring =
1/2 kx^2
27
Egrav =
mgh
28
VoSinθ
= sqrt (2 g h)
| = Vyi
29
VoCosθ
= Vxi
| = Vxf
30
Vy @ max h
= 0 m/s
31
ax
= 0 m/s
32
ay
= - 10 m/s
33
F applied
= T1 = T2 = T3
| = 1/3 (Mg)
34
T1 + T2 + T3
= Mg
35
Mechanical Advantage (of T1, T2, T3)
= Mg / F applied
| = 3 / 1
36
Angular Frequency of an Oscillating Spring
w = sqrt ( k / m)
Where k is the spring constant (stiffness)
37
Amplitude of a Spring Oscillation
= 1/2 mv^2 + mgh
38
Total Mechanical Energy of a Springs system
= 1/2 kx^2 + mgh
39
Hooke's Law
F = -kx
(the restoring force in a spring is linearly related to the degree of displacement from the equilibrium position of the spring)
