Torque: Practice Problem & Solution
A wheel having moment of inertia 2 kg-m² about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque which can stop the wheel's rotation in one minute would be
Short Solution (Best for NEET):
To solve this problem, we apply the core principles of Torque. Understanding the underlying formula is key to arriving at the correct answer below:
ω = ω0 + α.t
0= (60 × 2π /60) + α.60
⇒ α = - π/30
Torque = I α = (2× π/30) = (π/15) N-m
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