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प्रश्न
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
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उत्तर
Kinetic energy of the ball just before hitting the ground =
Initial potential energy= mgh=2 x 10 x 5 = 100 J
संबंधित प्रश्न
Fill in the blank
The energy possessed by a body due to its motion is called ______ energy.
Select the correct alternatives
The energy stored in an electric cell is
Name the form of mechanical energy, which is put to use.
State two disadvantages of using wind energy for generating electricity.
State two advantages of using nuclear energy for producing electricity.
Write the type of energy possessed in the following case:
A wound-up spring
State the energy changes which take place when:
An air gun is loaded and then fired.
Give one example when:
Light energy changes to chemical energy.
Use your brain power!
Why do tablets of camphor decrease in size day by day?
Nuclear fission is
