Advertisements
Advertisements
प्रश्न
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
Advertisements
उत्तर
Force due to gravity on the body F = mg
Work done in lifting the body against the force of gravity to a height h above the ground
W = F × d = mg × h = mgh
Thus, the potential energy of the body = mgh.
संबंधित प्रश्न
Which of the following produces more heat (per unit mass) on burning?
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
A body of mass m falls down through a height h. Obtain an expression for the work done by the force of gravity.
What is meant by the renewable and non-renewable sources of energy? Distinguish between them giving two examples of weach.
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
What kind of energy is possessed in a situation when?
A fish moving in the water.
State two advantages and disadvantages of using nuclear energy for producing electricity.
Give one example when:
Chemical energy to electrical energy.
What is nuclear energy? Explain the principle of producing electricity using nuclear energy is a nuclear reactor.
