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प्रश्न
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
उत्तर
A car engine converts chemical energy into mechanical energy.
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संबंधित प्रश्न
State the condition under which the mechanical energy is conserved.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)
Give two examples where a body possesses both, kinetic energy as well as potential energy.
What is the difference between potential energy and kinetic energy?
Name the device or machine which convert :
Chemical energy into electrical energy.
Name the device or machine which convert :
Light energy into electrical energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
Write the energy transformations which take place in an electric bulb (or electric lamp).
What do you understand by the term 'transformation of energy"? Explain with an example.
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
