Moving air is called wind. Scientists and engineers have successfully harnessed many natural resources present around us. Given below are some of the ways in which energy associated with moving air, i.e. wind, is used up.
i. For sailing boats
ii. Parachutes
iii. Aeroplanes
Which of the above depend on wind/air for their operations?
Moving air is called wind. Scientists and engineers have successfully harnessed many natural resources present around us. Given below are some of the ways in which energy associated with moving air, i.e. wind, is used up.
i. For sailing boats
ii. Parachutes
iii. Aeroplanes
Which of the above depend on wind/air for their operations?
The correct option is C (i), (ii), and (iii)
Moving air is called wind and since air has mass, moving air has energy. This energy is by virtue of its motion. The use of sails on boats and ships is another way energy from the wind has been used to create movement. The wind pushes against the sails, creating a force that is strong enough to move the boat through the water.
In the case of parachuting, however, it is the upward force that is most important. This force slows a parachute down, making it safe to jump from a great height. Air pushes up against the inside of the parachute, slowing the fall.
Airplanes are able to fly because air moving under their wings is strong enough to hold them up. The engines (propellers) in an aeroplane are used to make the air under the wings move at very high speed and thus make them capable enough to hold the aeroplanes up in the air.
Hence all the given devices depend on air for their operations
(i), (ii), and (iii)
Moving air is called wind and since air has mass, moving air has energy. This energy is by virtue of its motion. The use of sails on boats and ships is another way energy from the wind has been used to create movement. The wind pushes against the sails, creating a force that is strong enough to move the boat through the water.
In the case of parachuting, however, it is the upward force that is most important. This force slows a parachute down, making it safe to jump from a great height. Air pushes up against the inside of the parachute, slowing the fall.
Airplanes are able to fly because air moving under their wings is strong enough to hold them up. The engines (propellers) in an aeroplane are used to make the air under the wings move at very high speed and thus make them capable enough to hold the aeroplanes up in the air.
Hence all the given devices depend on air for their operations
