Advertisements
Advertisements
प्रश्न
Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?
उत्तर
- No, when we push a huge rock with all our strength but cannot move it, there is no transfer of energy.
- When we push the rock, our muscles tense and blood is displaced very rapidly to these muscles.
- These changes consume energy and we feel tired.
APPEARS IN
संबंधित प्रश्न
State whether the object possess kinetic energy, potential energy, or both :
A flying aeroplane _______________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Give two examples where a body possesses both, kinetic energy as well as potential energy.
What are the various forms of energy?
A ball of mass 0.5 kg slows down from a speed of 5 m/s so that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.
Name the device or machine which convert :
Electrical energy into light energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
Which one of the following is not the unit of energy?
An object is falling freely from a height x. After it has fallen a height `pi/2` , it will possess :
The device which converts mechanical energy into energy which runs our microwave oven is :
