First slide

Moment of intertia

Question

The flywheel of a motor has a moment of inertia of 9OO kg-m^2. If the motor produces a constant torque of 2700 N-m, then the flywheel starts from rest with an angular acceleration of

Easy

A

3 rad/sec²
B

9 rad./sec²
C

16 rad/sec²
D

20 rad,/sec²

Solution

$τ = Iα or α = τ / I$
$∴ α = \frac{2700}{900} = 3 rad / \sec^{2}$

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