Advertisements
Advertisements
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 ?
Advertisements
उत्तर
Kinetic energy of the ball just before hitting the ground =
Initial potential energy= mgh=2 x 10 x 5 = 100 J
संबंधित प्रश्न
State the energy change in the following device while in use:
A glowing electric bulb.
Write true or false of the following statement.
The energy of flowing water can be converted into electric energy (electricity).
Name the type of energy (kinetic or potential) possessed by the following:
A bullet fired from a gun.
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
What is solar energy?
A pebble is thrown up. It goes to a height and then comes back on the ground. State the different changes in form of energy during its motion.
Write the type of energy possessed in the following case:
A bent bow
State the energy changes which take place when:
A body released from rest from the top of a building.
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
Can you tell?
What are the various forms of energy?
