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A stationary horizontal disc is free to rotate about its axis.  When a torque is applied on it, its kinetic energy as a function of , where  is the angle by which it has rotated, is given as k . If its moment of inertia is I then the angular acceleration of the disc is :

(a)

(b)

θ

(c)

(d)


Question ID - 51208 | Toppr Answer

A stationary horizontal disc is free to rotate about its axis.  When a torque is applied on it, its kinetic energy as a function of , where  is the angle by which it has rotated, is given as k . If its moment of inertia is I then the angular acceleration of the disc is :

(a)

(b)

θ

(c)

(d)

1 Answer - 5876 Votes

3537

Answer Key : (a) -

 =

2k  = I

 =



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