2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-20

  • question_answer
    A ring starts from rest and acquires an angular speed of 10 rad/s in 2 s. The mass of the ring is 500 g and its radius is 20 cm. The torque on the ring is

    A)  0.02 Nm                    

    B)  0.20 Nm        

    C)       0.10 Nm          

    D)      0.01 Nm

    Correct Answer: C

    Solution :

    \[c.\] \[\therefore \]\[\alpha =\frac{10}{2}=5\,\text{rad/}{{\text{s}}^{\text{2}}}.\]  \[I=M{{R}^{2}}=\frac{1}{2}{{(0.2)}^{2}}=0.02\,kg\,{{m}^{2}}\] \[\therefore \]\[\tau =I\alpha =5\times 0.02=0.10\,Nm.\] Hence, the correction option is (b).


You need to login to perform this action.
You will be redirected in 3 sec spinner