physics help?

Question

A wheel is subjected to uniform angular acceleration. Initially its angular velocity is zero. During the first 1-s time interval, it rotates through an angle of 85.7.

(a) Through what angle does it rotate during the next 1-s time interval?

(b) Through what angle during the third 1-s time interval?

Answer 1

θ = θ0 + ωt + αt²/2
θ = αt²/2
α = 2θ/t² = 2*85.7/1

a) θ = 2*85.7*2²/2 - 85.7

b) θ = 2*85.7*3²/2 - 2*85.7*2²/2 + 85.7

Answer 2

The answer to both your questions is 85.7 because during uniform angular acceleration only the direction of the body changes, not the speed or the angle