Advertisements
Advertisements
Question
Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.
Advertisements
Solution
Let the equal mass of two bodies A and B be m.
Given : height h1 = 20 m
and h2 = 30 m
Potential energy of body A = mgh1
= m × g × 20
Potential energy of body B = mgh2
= m × g × 30
`"Ratio""P"_1/"P"_2=("m"xx"g"xx20)/("m"xx"g"xx30)=2/3`
RELATED QUESTIONS
State the energy change in the following device while in use:
A loudspeaker
State two advantages of geothermal energy.
How many MeV are equivalent to 1 atomic mass unit (u)?
Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.
What do you understand by the kinetic energy of a body?
State two disadvantages of producing electricity from solar energy.
What is hydro energy?
State two disadvantages of using nuclear energy for producing electricity.
Name the energy changes for each of the following cases:
dynamo
Is it possible that a body may possess energy even when it is not in motion?
