Question

Suppose you visit your native village after about 10 years. The village lies in a semi-
arid region and receives rainfall of 500 mm. Traditionally in the farming village, the
villagers used to practice mixed cropping of sorghum, pearl millet, pigeon pea,
chickpea, and groundnut. But over the last 15 years, they have shifted to paddy (rice)
cultivation in over 90% of the farming land. There are three small lakes in the village,
but the farmers rely on tube-wells for irrigation. When you took a tour of the village,
you found that two of the lakes have dried up while the surface of the third lake is
covered with an overgrowth of algae. Explain the reasons for the condition of the
three lakes. Also, suggest measures that the villagers need to adopt to restore these
wetlands to their original condition.

Answer 1

Inertia, property of a body by virtue of which it opposes any agency that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity. Inertia is a passive property and does not enable a body to do anything except oppose such active agents as forces and torques.