Q. 73.9( 127 Votes )
What are the various energy transformations that occur when you are riding a bicycle?
The chemical energy of the food changes into heat and then to muscular energy.
On paddling, the muscular energy is converted into kinetic energy of the pedal.
The kinetic energy of pedal is converted into kinetic energy of the bicycle.
The kinetic energy of cycle is converted to kinetic energy of the cyclist.
The mechanical energy is sum of potential energy and kinetic energy ,since potential energy is zero.
Thus ,we can say that the muscular energy of the cyclist is directly converted to the mechanical energy of the cyclist.
Rate this question :
Name the devices or machines which convert:
(i) Electrical energy into sound energy.
(ii) Hear energy into kinetic energy (or mechanical energy).
(iii) Chemical energy into kinetic energy (or mechanical energy).
(iv) Chemical energy into heat energy.
(v) Light energy into heat energy.Lakhmir Singh & Manjit Kaur - Physics
Which one of the following is not the unit of energy?
A. Joule B. Newton-metre
C. Kilowatt D. Kilowatt-hourLakhmir Singh & Manjit Kaur - Physics
Explain the transformation of energy in the following cases:
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.Lakhmir Singh & Manjit Kaur - Physics
Name the quantity whose unit is:
(b) Kilowatt – hourLakhmir Singh & Manjit Kaur - Physics
Define the term ‘energy’ of a body. What is the SI unit of energy?Lakhmir Singh & Manjit Kaur - Physics