A fan blade, initially

Question

at rest, rotates with a constant acceleration of 0.025 rad/s
2
. What is the
tim
e interval required for it to reach a 4.
2-rad displacem
ent after starting from
rest?

Answer 1

d = 0.5a*t^2 = 42 rad.
0.5*0.025*t^2 = 42