Advertisements
Advertisements
प्रश्न
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
पर्याय
kinetic energy
potential energy
Both
Advertisements
उत्तर
When switched off, a ceiling fan possesses only potential energy.
APPEARS IN
संबंधित प्रश्न
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
Is energy a vector quantity?
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Light energy into electrical energy.
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
A bulb lights up when connected to a battery. State the energy change which takes place :
Name the energy transfers which occur when :
someone speaks into a microphone
Name the energy transfers which occur when : there is a picture on a television screen
Which of the following energy change involves frictional force?
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)
