question_answer

In the following cases a) The work done when\[\theta =30{}^\circ \]is (a) \[5\sqrt{3}J\]                              (b) \[10\sqrt{3}J\]   (c) \[10J\]                            (d) \[2J\] b) Work done is zero when \[\theta ~=\_\_\_\_\_\] (a) \[0{}^\circ \]                                (b) \[\text{45}{}^\circ \]      (c) \[\text{6}0{}^\circ \]                                (d) \[\text{9}0{}^\circ \] c) Work done is maximum when\[\theta ~=\_\_\_\_\_\] (a) \[0{}^\circ \]                                (b) \[\text{45}{}^\circ \]      (c) \[\text{6}0{}^\circ \]                                                (d) \[\text{9}0{}^\circ \]

Answer:

a - 2, b - 4 ; c - 1