Question

An electronic motor is revolving at 2000rpm. After 3sec, it is moving at 150rpm.
Determine the angular acceleration.
What is angular momentum of the electric motor if the rotational inertia is 18.kg.square meter in initial velocity?
In final velocity?
What is the average angular momentum?

Answer 1

ω₀=2πn₀=2π•2000/60 rad/s
ω=2πn =2π•150/60 rad/s
ω=ω₀-εt
ε= (ω₀-ω)/t=….
L₀=I ω₀=…
L=I ω=…
L(ave) =(L+L₀)/2

Answer 2

i thank thee for leh answer :D