Advertisements
Advertisements
प्रश्न
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
Advertisements
उत्तर
Law of conservation of energy is used in answering these questions.
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.
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
What kind of energy is possessed by the following?
A stretched rubber band _____________
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Chemical energy into heat energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 minute?
What is the meaning of the symbol kWh? What quantity does it represent?
Name the energy transfers which occur when a torch is on.
