Question 626: Centre of Mass and Rotational Motion

Question

The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in rad/s2 is

Accepted Answer

Angular acceleration $$\alpha  = {{{\omega _f} - {\omega _i}} \over t}$$
$${\omega _f} = 3120 	imes {{2\pi } \over {60}}$$ rad/s
$${\omega _i} =1200 	imes {{2\pi } \over {60}}$$ rad/s
$$ \Rightarrow \alpha  = {{(3120 - 1200)} \over {16}} 	imes {{2\pi } \over {60}} = 4\pi $$

Answer

2$$\pi$$

Answer

4$$\pi$$

Answer

12$$\pi$$

Answer

104$$\pi$$

Centre of Mass and Rotational Motion

The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in rad/s2 is

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