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
State two advantages of geothermal energy.
Name the type of energy (kinetic or potential) possessed by the following:
A bullet fired from a gun.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving cricket ball
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
What is wind energy?
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).
What kind of energy is possessed in a situation when?
A fish moving in the water.
Write the type of energy possessed in the following case:
A bent bow
A boy sits and stands repeatedly. Draw a graph showing the variation of potential energy with time.
Can you tell?
Describe one natural chain of transformation of energy.
