Advertisements
Advertisements
प्रश्न
A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g = 10ms−2]
उत्तर
Given, Mass = 0.2 kg
Height, h = 10 m to 6 m
Loss in Potential Energy = mg (h1 − h2)
= 0.2 × 10 (10 − 6) = 8 J
APPEARS IN
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the ground.
Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.
State the energy changes in the following case while in use:
an electric bulb
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s-2)
State the energy changes which take place when:
An air gun is loaded and then fired.
Give one example when:
Electric energy changes to potential energy.
A body of mass m falls from a height h1 to a height h2, above the ground (h1 > h2). What is the loss of potential energy?
