Question -
A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. In the first 2 sec, it rotates through an angle θ1. In the next 2 sec, it rotates through an additional angle θ2 . The ratio of angles is
Options:
A .  1
B .  2
C .  3
D .  5
Answer: Option C : C Using relation θ = ω0t + 12αt2 θ1 = 12 (α) 22 = 2 α ..(i) (As ω0=0,t=2sec) Now using same question for t = 4 sec , ω0 = 0 θ1 + θ2 = 12(4)2 = 8 α ..(ii) From (i) and (ii), θ1 = 2 α and θ2 = 6α∴θ1θ2 = 3
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