Question

#hey dude

#see these attachment

# be brainly

Answer 1

Answer :

Option(A)

Explanation :

Initial angular velocity = n₁ = 0

Final angular velocity = n₂ = 210 r.p.m = (210/60) r.p.s

dω = 2π(n₂ - n₁)

     = 2π(210/60 - 0)

    = 7 π rad/sec.

Then,

α = dω/dt

  = (2π * 210)/60 * 5

 = 1320/300

 = 4.4 rad/s²

∴ Angular acceleration of the wheel is 4.4 rad/s²

#BeBrainly