Advertisements
Advertisements
प्रश्न
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
Advertisements
उत्तर
A stone kept on a roof possesses gravitational potential energy because of its height from the ground.
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.
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)
Name the device or machine which convert :
Chemical energy into electrical energy.
Write the energy transformations which take place in an electric bulb (or electric lamp).
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
Name the energy transfers which occur when : a torch is on
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
An object is falling freely from a height x. After it has fallen a height `pi/2` , it will possess :
In the case of negative work, the angle between the force and displacement is
