9th Class
Science
Work and energy
Question Bank
Work Power and Energy Summative Subjective Problems
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) \[\text{9}0{}^\circ \]