Question

Soham visited Sundarban on a short trip during winter break with his parents. He saw that

boys of his age were playing football near the bank of the river. A few old fisher men

were sitting in sun to dry their fishing net. Fisher men in their small country boats were

catching fish and the boats were driven by hand pedal. At the evening, the rooms of the

cottages and roads illuminated with lights connected to batteries which are charged by

solar panels.

a) What kind of energy is possessed by a rolling football?

b) Have any work done by the fisher men while the boats were sailing?

c) Mention the transformation of energy to produce light here.

d) With the help of which energy, the fishermen were drying their nets.



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Answer 1

a) A moving ball due to motion possesses KINETIC ENERGY.

c) It is used to produce light. Here, electrical energy is converted into heat energy which is then converted into light energy. In case of a CFL, the electrical energy is directly converted into light energy and hence there is no wastage of energy