AIPMT PRELIMS2011Physics-Rotational Motion
AIPMT PRELIMS 2011 Physics Angular Motion MCQ Question
Type: MCQ-numerical-Medium-Class 11
The instantaneous angular position of a point on a rotating wheel is given by the equation θ(t) = 2t² – 6t². The torque on the wheel becomes zero at
A
t = 2 s
B
t = 1 s
C
t = 0.2 s
D
t = 0.25 s
Correct Answer
Option B
Detailed Explanation
Torque zero means, α = 0. Therefore, d²θ/dt² = 0. Solving 12t – 12 = 0 gives t = 1 second.
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