Advertisements
Advertisements
प्रश्न
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
Advertisements
उत्तर
Let the inital kinetic energy be E1=E
Now, the kinetic energy is directly proportional to the square of the velocity
K.E ∝ v2
∴ Final kinetic energy =E2=`1/9E`
Hence, the change in kinetic energy is given as,
`ΔE=E_1-E_2`
`Delta E=E-1/9E`
`Delta E=8/9E`
APPEARS IN
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.
Name the form of mechanical energy, which is put to use.
What is wind energy?
State the energy transformation on the following:
Electricity is obtained from wind energy.
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
What do you understand by mechanical energy?
Is it possible that a body may possess energy even when it is not in motion?
What kind of energy is possessed in a situation when?
A horse running along a level road
State two advantages and disadvantages of using wind energy for producing electricity.
