Advertisements
Advertisements
प्रश्न
State the energy changes which take place when:
An air gun is loaded and then fired.
Advertisements
उत्तर
During loading, the mechanical energy changes to the potential energy of spring. On firing, the potential energy of spring changes to the kinetic energy of the bullet.
APPEARS IN
संबंधित प्रश्न
Select the correct alternatives
The energy stored in an electric cell is
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?
Give one example to show the conversion of potential energy to kinetic energy when put in use.
Write an expression for the potential energy of a body of mass m placed at a height h above the earth's surface. State the assumptions made, if any.
State the energy changes in the following case while in use:
an electric toaster.
State whether a solar cell produces a.c. or d.c.
Name the energy changes for the following:
electric ball
Name the energy changes for the following:
bicycle brakes
What is the form of that graph between
(i) K.E. and velocity for a constant mass?
(ii) K.E. and mass for a constant velocity?
What is meant by energy?
