Advertisements
Advertisements
प्रश्न
State whether the object possess kinetic energy, potential energy, or both :
A bird running on the ground ____________.
विकल्प
kinetic energy
potential energy
Both
उत्तर
A bird running on the ground possesses only kinetic energy.
APPEARS IN
संबंधित प्रश्न
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
Give two examples where a body possesses both, kinetic energy as well as potential energy.
A ball of mass 0.5 kg slows down from a speed of 5 m/s so that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Electrical energy into heat energy.
Fill in the blank with suitable word:
The electricity meter installed in our homes measure electrical energy in the units of ___________.
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
A body of mass 10 kg falls from a height of 20 m to 8 m. Calculate:
- the loss in potential energy of the body, and
- the total energy possessed by the body at any instant? (Take g = 10 m s-2)
