Question

please help me in this question

Answer 1

ω = v/r

= 80 x /20/π = 4π

ωo= 0

θ=2π x n = 4π (n=2)

ω2=ωo2 + 2αθ

α=ω2-ωo2/2θ === 16π2/2 x 4π ==== 2π

tangential acc == rα === 20/π x 2π === 40m/s2