Quesion 2
Wind does not help in the movement of which of the following?
a) Firki
b) Weather cock
c) Ceiling fan
d) Sailing yacht
c) ceiling fan
The movement of a ceiling fan is due to the electric current and not because of the natural wind.
Question 9.3
State whether the following statements are true or false. If false, correct them.
Air helps in the movements of sailing yachts and glider but plays no role in the flight of birds and aeroplanes.