Column I | Column II | ||
a. | Eutrophication | i. | UV-B radiation |
b. | Sanitary landfill | ii. | Deforestation |
c. | Snow blindness | iii. | Nutrient enrichment |
d. | Jhum cultivation | iv. | Waste disposal |
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :