Advertisements
Advertisements
प्रश्न
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
Advertisements
उत्तर
The ability of a body to do work is called energy. The ability of a body to do work because of its motion is called kinetic energy.
APPEARS IN
संबंधित प्रश्न
A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
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.
What kind of energy is possessed by the following?
A compressed spring ____________.
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 :
Heat energy into kinetic energy (or mechanical energy).
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
A microphone converts :
