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← JEE Main 2022 · 24 Jun · Shift 2
PhysicsSingle correct+4 / -1Question 43 of 90

JEE Main 2022 · 24 Jun · Shift 2, Physics question 43

A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be :

Choose one option
Answer and worked solution

Official answer: B

From rest. θ=12αt2\theta=\frac12\alpha t^2, so θ∝t2\theta\propto t^2.

Angles. In 1 s: 5 rad. In 2 s: 20 rad. In the second second: 20−5=1520-5=15 rad.

(B)