question_answer

A spot of lights rotates in a horizontal plane with a constant angular velocity of 0.1rad/s. The spot of light P moves along the wall at a distance of 3 m from S. The velocity of spot P, where, \[\frac{3}{2}M{{L}^{2}}\]is    

A)                   0.5 m/s                

B) 0.6 m/s

C) 0.7 m/s                

D) 0.8 m/s

Correct Answer: B

Solution :

                The situation is shown in figure \[f\] \[1.11f\] \[1.22f\]                 \[f\]       \[1.27f\]                 \[\text{1}.0\text{1}\times \text{1}{{0}^{\text{5}}}\text{ N}/{{\text{m}}^{\text{2}}}\]                \[\text{9}.\text{13}\times \text{1}{{0}^{\text{4}}}\text{ N}/{{\text{m}}^{\text{2}}}\]                 At           \[\text{9}.\text{13}\times \text{1}{{0}^{\text{3}}}\text{N}/{{\text{m}}^{\text{2}}}\]                 \[\text{18}.\text{26 N}/{{\text{m}}^{\text{2}}}\]              \[\text{2}.\text{25}\times \text{1}{{0}^{\text{3}}}\text{min}\]                                 \[\text{3}.\text{97}\times \text{1}{{0}^{\text{3}}}\text{min}\]