Advertisements
Advertisements
Question
Can a body possess energy even when it is not in motion ? Explain your answer with an example.
Advertisements
Solution
Yes, a body possesses energy even when it is not in motion ;
Consider a body raised to a certain height say h. It its velocity is zero. Kinetic energy will be zero but the body will have.
P.E. = mgh
Thus, a body may possess energy even though it is not in motion.
APPEARS IN
RELATED QUESTIONS
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?
Name the type of energy (kinetic or potential) possessed by the following:
A moving cricket ball.
State the work energy theorem.
State the energy changes in the following case while in use:
a ceiling fan
Select the renewable and non-renewable sources of energy from the following:
Wood
State two disadvantages of using nuclear energy for producing electricity.
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The total energy possessed by the body at any instant? (Take g = 10 ms-2).
Explain the principle of working of the windmill for generating electricity.
State the energy transformation on the following:
Electricity obtained from hydro energy.
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
