A pelton wheel attains its operating speed of 800 rev/min within 2s after it is turn on. Determine the constant angular accelerations of pelton wheel. also find the total number of revolutions the wheel makes before it attains operating speed

f=800 rev/min= 800/60 rev/s.

2πf=εt
ε=2πf/t = 2π•800/60•2= 41.89 rad/s^2