(a) What do you understand by the term "transformation of energy" ? Explain with an example.
(b) Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
(a) What do you understand by the term "transformation of energy" ? Explain with an example.
(b) Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
a) The conversion of energy from one form to another is called transformation of energy.
The application of inter-conversion of potential energy and kinetic energy can be described using a bow and an arrow.
When the archer pull the string with the arrow a small part of the muscular energy of the archer is transferred to the bow and is stored as the potential energy (here it is the elastic potential energy) of the bow. When the string is released the potential energy in the bow is transferred to the arrow as the kinetic energy of the arrow. The arrow shoots out with a certain velocity.
Another example is an electric bulb. An electric bulb converts electric energy to heat and light energy.
b)i)When a ball thrown up all of its kinetic energy is converted into potential energy at the top point.
ii)When a stone is drop from certain height all of its potential energy at that height is converted into kinetic energy just above the ground.
The conversion of energy from one form to another is called transformation of energy.
The application of inter-conversion of potential energy and kinetic energy can be described using a bow and an arrow.
When the archer pull the string with the arrow a small part of the muscular energy of the archer is transferred to the bow and is stored as the potential energy (here it is the elastic potential energy) of the bow. When the string is released the potential energy in the bow is transferred to the arrow as the kinetic energy of the arrow. The arrow shoots out with a certain velocity.
Another example is an electric bulb. An electric bulb converts electric energy to heat and light energy.
b)i)When a ball thrown up all of its kinetic energy is converted into potential energy at the top point.
ii)When a stone is drop from certain height all of its potential energy at that height is converted into kinetic energy just above the ground.
