FLYWHEELS

Question 1

Kinetic Energy, KE

Answer 1

1/2 mv^2

(W/2g)(v1^2 - v2^2)

(mk^2/2)(ω1^2 - ω2^2)

Question 2

Weight of flywheel

Answer 2

W = W_r + W_ah

W_r = weight of flywheel rim
W_r = πDbtρ
ρ or iron = 7200 kg/m^3

W_ah = weight of arms and hub

Question 3

Coefficient of Fluctuation of Flywheel, Cf

Answer 3

(V1-V2)/V

V = (V1+V2)/2

V1 = max speed
V2 = min speed

Question 4

Energy Required to Punch a metal, E

Answer 4

1/2 F*t

1/2 S_su * A * t

F = force required to punch a hole = S_su *A
S_Su = ultimate shearing stress
A = shear area = πdt for circular hole
t = thickness of metal plate
d = diameter of hole

Question 5

Pressure or Force required to punch a hole, P or F

Answer 5

d * t * 80 in tons